using System;
using System.Collections;
using System.Collections.Generic;
using System.ComponentModel;
using System.Diagnostics;
using System.Diagnostics.CodeAnalysis;
using System.Linq.Expressions;
using System.Reflection;
using System.Resources;
using System.Runtime.CompilerServices;
using System.Runtime.ExceptionServices;
using System.Runtime.InteropServices;
using System.Runtime.Versioning;
using System.Threading.Tasks;
using FxResources.Microsoft.Extensions.DependencyInjection.Abstractions;
using Microsoft.CodeAnalysis;
using Microsoft.Extensions.Internal;

[assembly: CompilationRelaxations(8)]
[assembly: RuntimeCompatibility(WrapNonExceptionThrows = true)]
[assembly: Debuggable(DebuggableAttribute.DebuggingModes.IgnoreSymbolStoreSequencePoints)]
[assembly: InternalsVisibleTo("Microsoft.Extensions.DependencyInjection.Tests, PublicKey=0024000004800000940000000602000000240000525341310004000001000100f33a29044fa9d740c9b3213a93e57c84b472c84e0b8a0e1ae48e67a9f8f6de9d5f7f3d52ac23e48ac51801f1dc950abe901da34d2a9e3baadb141a17c77ef3c565dd5ee5054b91cf63bb3c6ab83f72ab3aafe93d0fc3c2348b764fafb0b1c0733de51459aeab46580384bf9d74c4e28164b7cde247f891ba07891c9d872ad2bb")]
[assembly: TargetFramework(".NETStandard,Version=v2.1", FrameworkDisplayName = ".NET Standard 2.1")]
[assembly: AssemblyMetadata("Serviceable", "True")]
[assembly: AssemblyMetadata("PreferInbox", "True")]
[assembly: AssemblyDefaultAlias("Microsoft.Extensions.DependencyInjection.Abstractions")]
[assembly: NeutralResourcesLanguage("en-US")]
[assembly: CLSCompliant(true)]
[assembly: AssemblyMetadata("IsTrimmable", "True")]
[assembly: AssemblyMetadata("IsAotCompatible", "True")]
[assembly: DefaultDllImportSearchPaths(DllImportSearchPath.System32 | DllImportSearchPath.AssemblyDirectory)]
[assembly: AssemblyCompany("Microsoft Corporation")]
[assembly: AssemblyCopyright("© Microsoft Corporation. All rights reserved.")]
[assembly: AssemblyDescription("Abstractions for dependency injection.\r\n\r\nCommonly Used Types:\r\nMicrosoft.Extensions.DependencyInjection.IServiceCollection")]
[assembly: AssemblyFileVersion("10.0.1126.37416")]
[assembly: AssemblyInformationalVersion("10.0.11+e2f47b0110ed922f21a1522da67279133ce28f32")]
[assembly: AssemblyProduct("Microsoft® .NET")]
[assembly: AssemblyTitle("Microsoft.Extensions.DependencyInjection.Abstractions")]
[assembly: AssemblyMetadata("RepositoryUrl", "https://github.com/dotnet/dotnet")]
[assembly: AssemblyVersion("10.0.0.0")]
[module: RefSafetyRules(11)]
[module: NullablePublicOnly(true)]
namespace Microsoft.CodeAnalysis
{
	[CompilerGenerated]
	[Embedded]
	internal sealed class EmbeddedAttribute : Attribute
	{
	}
}
namespace System.Runtime.CompilerServices
{
	[CompilerGenerated]
	[Embedded]
	[AttributeUsage(AttributeTargets.Class | AttributeTargets.Property | AttributeTargets.Field | AttributeTargets.Event | AttributeTargets.Parameter | AttributeTargets.ReturnValue | AttributeTargets.GenericParameter, AllowMultiple = false, Inherited = false)]
	internal sealed class NullableAttribute : Attribute
	{
		public readonly byte[] NullableFlags;

		public NullableAttribute(byte P_0)
		{
			NullableFlags = new byte[1] { P_0 };
		}

		public NullableAttribute(byte[] P_0)
		{
			NullableFlags = P_0;
		}
	}
	[CompilerGenerated]
	[Embedded]
	[AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct | AttributeTargets.Method | AttributeTargets.Interface | AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
	internal sealed class NullableContextAttribute : Attribute
	{
		public readonly byte Flag;

		public NullableContextAttribute(byte P_0)
		{
			Flag = P_0;
		}
	}
	[CompilerGenerated]
	[Embedded]
	[AttributeUsage(AttributeTargets.Module, AllowMultiple = false, Inherited = false)]
	internal sealed class NullablePublicOnlyAttribute : Attribute
	{
		public readonly bool IncludesInternals;

		public NullablePublicOnlyAttribute(bool P_0)
		{
			IncludesInternals = P_0;
		}
	}
	[CompilerGenerated]
	[Embedded]
	[AttributeUsage(AttributeTargets.Module, AllowMultiple = false, Inherited = false)]
	internal sealed class RefSafetyRulesAttribute : Attribute
	{
		public readonly int Version;

		public RefSafetyRulesAttribute(int P_0)
		{
			Version = P_0;
		}
	}
	[CompilerGenerated]
	[Embedded]
	[AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct | AttributeTargets.Enum | AttributeTargets.Method | AttributeTargets.Property | AttributeTargets.Field | AttributeTargets.Event | AttributeTargets.Interface | AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
	internal sealed class ExtensionMarkerAttribute : Attribute
	{
		public ExtensionMarkerAttribute(string name)
		{
		}
	}
}
namespace FxResources.Microsoft.Extensions.DependencyInjection.Abstractions
{
	internal static class SR
	{
	}
}
namespace System
{
	internal static class SR
	{
		private static readonly bool s_usingResourceKeys = GetUsingResourceKeysSwitchValue();

		private static ResourceManager s_resourceManager;

		internal static ResourceManager ResourceManager => s_resourceManager ?? (s_resourceManager = new ResourceManager(typeof(SR)));

		internal static string AmbiguousConstructorMatch => GetResourceString("AmbiguousConstructorMatch");

		internal static string CannotResolveService => GetResourceString("CannotResolveService");

		internal static string NoConstructorMatch => GetResourceString("NoConstructorMatch");

		internal static string NoServiceRegistered => GetResourceString("NoServiceRegistered");

		internal static string ServiceCollectionReadOnly => GetResourceString("ServiceCollectionReadOnly");

		internal static string TryAddIndistinguishableTypeToEnumerable => GetResourceString("TryAddIndistinguishableTypeToEnumerable");

		internal static string MultipleCtorsMarkedWithAttribute => GetResourceString("MultipleCtorsMarkedWithAttribute");

		internal static string MarkedCtorMissingArgumentTypes => GetResourceString("MarkedCtorMissingArgumentTypes");

		internal static string CannotCreateAbstractClasses => GetResourceString("CannotCreateAbstractClasses");

		internal static string MultipleCtorsFoundWithBestLength => GetResourceString("MultipleCtorsFoundWithBestLength");

		internal static string UnableToResolveService => GetResourceString("UnableToResolveService");

		internal static string CtorNotLocated => GetResourceString("CtorNotLocated");

		internal static string MultipleCtorsFound => GetResourceString("MultipleCtorsFound");

		internal static string KeyedServicesNotSupported => GetResourceString("KeyedServicesNotSupported");

		internal static string NonKeyedDescriptorMisuse => GetResourceString("NonKeyedDescriptorMisuse");

		private static bool GetUsingResourceKeysSwitchValue()
		{
			if (!AppContext.TryGetSwitch("System.Resources.UseSystemResourceKeys", out var isEnabled))
			{
				return false;
			}
			return isEnabled;
		}

		internal static bool UsingResourceKeys()
		{
			return s_usingResourceKeys;
		}

		private static string GetResourceString(string resourceKey)
		{
			if (UsingResourceKeys())
			{
				return resourceKey;
			}
			string result = null;
			try
			{
				result = ResourceManager.GetString(resourceKey);
			}
			catch (MissingManifestResourceException)
			{
			}
			return result;
		}

		private static string GetResourceString(string resourceKey, string defaultString)
		{
			string resourceString = GetResourceString(resourceKey);
			if (!(resourceKey == resourceString) && resourceString != null)
			{
				return resourceString;
			}
			return defaultString;
		}

		internal static string Format(string resourceFormat, object? p1)
		{
			if (UsingResourceKeys())
			{
				return string.Join(", ", resourceFormat, p1);
			}
			return string.Format(resourceFormat, p1);
		}

		internal static string Format(string resourceFormat, object? p1, object? p2)
		{
			if (UsingResourceKeys())
			{
				return string.Join(", ", resourceFormat, p1, p2);
			}
			return string.Format(resourceFormat, p1, p2);
		}

		internal static string Format(string resourceFormat, object? p1, object? p2, object? p3)
		{
			if (UsingResourceKeys())
			{
				return string.Join(", ", resourceFormat, p1, p2, p3);
			}
			return string.Format(resourceFormat, p1, p2, p3);
		}

		internal static string Format(string resourceFormat, params object?[]? args)
		{
			if (args != null)
			{
				if (UsingResourceKeys())
				{
					return resourceFormat + ", " + string.Join(", ", args);
				}
				return string.Format(resourceFormat, args);
			}
			return resourceFormat;
		}

		internal static string Format(IFormatProvider? provider, string resourceFormat, object? p1)
		{
			if (UsingResourceKeys())
			{
				return string.Join(", ", resourceFormat, p1);
			}
			return string.Format(provider, resourceFormat, p1);
		}

		internal static string Format(IFormatProvider? provider, string resourceFormat, object? p1, object? p2)
		{
			if (UsingResourceKeys())
			{
				return string.Join(", ", resourceFormat, p1, p2);
			}
			return string.Format(provider, resourceFormat, p1, p2);
		}

		internal static string Format(IFormatProvider? provider, string resourceFormat, object? p1, object? p2, object? p3)
		{
			if (UsingResourceKeys())
			{
				return string.Join(", ", resourceFormat, p1, p2, p3);
			}
			return string.Format(provider, resourceFormat, p1, p2, p3);
		}

		internal static string Format(IFormatProvider? provider, string resourceFormat, params object?[]? args)
		{
			if (args != null)
			{
				if (UsingResourceKeys())
				{
					return resourceFormat + ", " + string.Join(", ", args);
				}
				return string.Format(provider, resourceFormat, args);
			}
			return resourceFormat;
		}
	}
	internal static class ExceptionPolyfills
	{
		[SpecialName]
		public sealed class <G>$E6188BA5B951F1F7AA9135E0EBB76F2B
		{
			[SpecialName]
			public static class <M>$96F0261AC622664B8B003966835C0332
			{
			}

			[ExtensionMarker("<M>$96F0261AC622664B8B003966835C0332")]
			public static void ThrowIfNull([NotNull] object? argument, [CallerArgumentExpression("argument")] string? paramName = null)
			{
				throw null;
			}
		}

		[SpecialName]
		public sealed class <G>$3F30F31B33543D5FB8E174FB4FD780B9
		{
			[SpecialName]
			public static class <M>$1F10CFA08738E6D8AF61CBECC6763DBC
			{
			}

			[ExtensionMarker("<M>$1F10CFA08738E6D8AF61CBECC6763DBC")]
			public static void ThrowIf([DoesNotReturnIf(true)] bool condition, object instance)
			{
				throw null;
			}

			[ExtensionMarker("<M>$1F10CFA08738E6D8AF61CBECC6763DBC")]
			public static void ThrowIf([DoesNotReturnIf(true)] bool condition, Type type)
			{
				throw null;
			}
		}

		public static void ThrowIfNull([NotNull] object? argument, [CallerArgumentExpression("argument")] string? paramName = null)
		{
			if (argument == null)
			{
				ThrowArgumentNullException(paramName);
			}
		}

		[DoesNotReturn]
		private static void ThrowArgumentNullException(string paramName)
		{
			throw new ArgumentNullException(paramName);
		}

		public static void ThrowIf([DoesNotReturnIf(true)] bool condition, object instance)
		{
			if (condition)
			{
				ThrowObjectDisposedException(instance);
			}
		}

		public static void ThrowIf([DoesNotReturnIf(true)] bool condition, Type type)
		{
			if (condition)
			{
				ThrowObjectDisposedException(type);
			}
		}

		[DoesNotReturn]
		private static void ThrowObjectDisposedException(object instance)
		{
			throw new ObjectDisposedException(instance?.GetType().FullName);
		}

		[DoesNotReturn]
		private static void ThrowObjectDisposedException(Type type)
		{
			throw new ObjectDisposedException(type?.FullName);
		}
	}
}
namespace System.Runtime.InteropServices
{
	[AttributeUsage(AttributeTargets.Method, AllowMultiple = false, Inherited = false)]
	internal sealed class LibraryImportAttribute : Attribute
	{
		public string LibraryName { get; }

		public string? EntryPoint { get; set; }

		public StringMarshalling StringMarshalling { get; set; }

		public Type? StringMarshallingCustomType { get; set; }

		public bool SetLastError { get; set; }

		public LibraryImportAttribute(string libraryName)
		{
			LibraryName = libraryName;
		}
	}
	internal enum StringMarshalling
	{
		Custom,
		Utf8,
		Utf16
	}
}
namespace System.Runtime.CompilerServices
{
	[AttributeUsage(AttributeTargets.Class, Inherited = false)]
	internal sealed class CompilerLoweringPreserveAttribute : Attribute
	{
	}
	[AttributeUsage(AttributeTargets.Parameter, AllowMultiple = false, Inherited = false)]
	internal sealed class CallerArgumentExpressionAttribute : Attribute
	{
		public string ParameterName { get; }

		public CallerArgumentExpressionAttribute(string parameterName)
		{
			ParameterName = parameterName;
		}
	}
}
namespace System.Diagnostics.CodeAnalysis
{
	[CompilerLoweringPreserve]
	[AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct | AttributeTargets.Method | AttributeTargets.Property | AttributeTargets.Field | AttributeTargets.Interface | AttributeTargets.Parameter | AttributeTargets.ReturnValue | AttributeTargets.GenericParameter, Inherited = false)]
	internal sealed class DynamicallyAccessedMembersAttribute : Attribute
	{
		public DynamicallyAccessedMemberTypes MemberTypes { get; }

		public DynamicallyAccessedMembersAttribute(DynamicallyAccessedMemberTypes memberTypes)
		{
			MemberTypes = memberTypes;
		}
	}
	[Flags]
	internal enum DynamicallyAccessedMemberTypes
	{
		None = 0,
		PublicParameterlessConstructor = 1,
		PublicConstructors = 3,
		NonPublicConstructors = 4,
		PublicMethods = 8,
		NonPublicMethods = 0x10,
		PublicFields = 0x20,
		NonPublicFields = 0x40,
		PublicNestedTypes = 0x80,
		NonPublicNestedTypes = 0x100,
		PublicProperties = 0x200,
		NonPublicProperties = 0x400,
		PublicEvents = 0x800,
		NonPublicEvents = 0x1000,
		Interfaces = 0x2000,
		NonPublicConstructorsWithInherited = 0x4004,
		NonPublicMethodsWithInherited = 0x8010,
		NonPublicFieldsWithInherited = 0x10040,
		NonPublicNestedTypesWithInherited = 0x20100,
		NonPublicPropertiesWithInherited = 0x40400,
		NonPublicEventsWithInherited = 0x81000,
		PublicConstructorsWithInherited = 0x100003,
		PublicNestedTypesWithInherited = 0x200080,
		AllConstructors = 0x104007,
		AllMethods = 0x8018,
		AllFields = 0x10060,
		AllNestedTypes = 0x220180,
		AllProperties = 0x40600,
		AllEvents = 0x81800,
		[EditorBrowsable(EditorBrowsableState.Never)]
		All = -1
	}
	[AttributeUsage(AttributeTargets.Class | AttributeTargets.Constructor | AttributeTargets.Method, Inherited = false)]
	internal sealed class RequiresDynamicCodeAttribute : Attribute
	{
		public bool ExcludeStatics { get; set; }

		public string Message { get; }

		public string? Url { get; set; }

		public RequiresDynamicCodeAttribute(string message)
		{
			Message = message;
		}
	}
	[AttributeUsage(AttributeTargets.All, Inherited = false, AllowMultiple = true)]
	internal sealed class UnconditionalSuppressMessageAttribute : Attribute
	{
		public string Category { get; }

		public string CheckId { get; }

		public string? Scope { get; set; }

		public string? Target { get; set; }

		public string? MessageId { get; set; }

		public string? Justification { get; set; }

		public UnconditionalSuppressMessageAttribute(string category, string checkId)
		{
			Category = category;
			CheckId = checkId;
		}
	}
	[AttributeUsage(AttributeTargets.Method | AttributeTargets.Property, Inherited = false, AllowMultiple = true)]
	internal sealed class MemberNotNullAttribute : Attribute
	{
		public string[] Members { get; }

		public MemberNotNullAttribute(string member)
		{
			Members = new string[1] { member };
		}

		public MemberNotNullAttribute(params string[] members)
		{
			Members = members;
		}
	}
	[AttributeUsage(AttributeTargets.Method | AttributeTargets.Property, Inherited = false, AllowMultiple = true)]
	internal sealed class MemberNotNullWhenAttribute : Attribute
	{
		public bool ReturnValue { get; }

		public string[] Members { get; }

		public MemberNotNullWhenAttribute(bool returnValue, string member)
		{
			ReturnValue = returnValue;
			Members = new string[1] { member };
		}

		public MemberNotNullWhenAttribute(bool returnValue, params string[] members)
		{
			ReturnValue = returnValue;
			Members = members;
		}
	}
}
namespace Microsoft.Extensions.Internal
{
	internal static class ParameterDefaultValue
	{
		public static bool TryGetDefaultValue(ParameterInfo parameter, out object? defaultValue)
		{
			bool tryToGetDefaultValue;
			bool num = CheckHasDefaultValue(parameter, out tryToGetDefaultValue);
			defaultValue = null;
			if (num)
			{
				if (tryToGetDefaultValue)
				{
					defaultValue = parameter.DefaultValue;
				}
				bool flag = parameter.ParameterType.IsGenericType && parameter.ParameterType.GetGenericTypeDefinition() == typeof(Nullable<>);
				if (defaultValue == null && parameter.ParameterType.IsValueType && !flag)
				{
					defaultValue = CreateValueType(parameter.ParameterType);
				}
				if (defaultValue != null && flag)
				{
					Type underlyingType = Nullable.GetUnderlyingType(parameter.ParameterType);
					if (underlyingType != null && underlyingType.IsEnum)
					{
						defaultValue = Enum.ToObject(underlyingType, defaultValue);
					}
				}
			}
			return num;
			[UnconditionalSuppressMessage("ReflectionAnalysis", "IL2067:UnrecognizedReflectionPattern", Justification = "CreateValueType is only called on a ValueType. You can always create an instance of a ValueType.")]
			static object? CreateValueType(Type t)
			{
				return RuntimeHelpers.GetUninitializedObject(t);
			}
		}

		public static bool CheckHasDefaultValue(ParameterInfo parameter, out bool tryToGetDefaultValue)
		{
			tryToGetDefaultValue = true;
			try
			{
				return parameter.HasDefaultValue;
			}
			catch (FormatException) when (parameter.ParameterType == typeof(DateTime))
			{
				tryToGetDefaultValue = false;
				return true;
			}
		}
	}
}
namespace Microsoft.Extensions.DependencyInjection
{
	public static class ActivatorUtilities
	{
		private readonly struct FactoryParameterContext
		{
			public Type ParameterType { get; }

			public bool HasDefaultValue { get; }

			public object DefaultValue { get; }

			public int ArgumentIndex { get; }

			public object ServiceKey { get; }

			public FactoryParameterContext(Type parameterType, bool hasDefaultValue, object defaultValue, int argumentIndex, object serviceKey)
			{
				ParameterType = parameterType;
				HasDefaultValue = hasDefaultValue;
				DefaultValue = defaultValue;
				ArgumentIndex = argumentIndex;
				ServiceKey = serviceKey;
			}
		}

		private sealed class ConstructorInfoEx
		{
			public readonly ConstructorInfo Info;

			public readonly ParameterInfo[] Parameters;

			public readonly bool IsPreferred;

			private readonly object[] _parameterKeys;

			public ConstructorInfoEx(ConstructorInfo constructor)
			{
				Info = constructor;
				Parameters = constructor.GetParameters();
				IsPreferred = constructor.IsDefined(typeof(ActivatorUtilitiesConstructorAttribute), inherit: false);
				for (int i = 0; i < Parameters.Length; i++)
				{
					FromKeyedServicesAttribute fromKeyedServicesAttribute = (FromKeyedServicesAttribute)Attribute.GetCustomAttribute(Parameters[i], typeof(FromKeyedServicesAttribute), inherit: false);
					if (fromKeyedServicesAttribute != null)
					{
						if (_parameterKeys == null)
						{
							_parameterKeys = new object[Parameters.Length];
						}
						_parameterKeys[i] = fromKeyedServicesAttribute.Key;
					}
				}
			}

			public bool IsService(IServiceProviderIsService serviceProviderIsService, int parameterIndex)
			{
				ParameterInfo parameterInfo = Parameters[parameterIndex];
				object[] parameterKeys = _parameterKeys;
				object obj = ((parameterKeys != null) ? parameterKeys[parameterIndex] : null);
				if (obj != null)
				{
					if (serviceProviderIsService is IServiceProviderIsKeyedService serviceProviderIsKeyedService)
					{
						return serviceProviderIsKeyedService.IsKeyedService(parameterInfo.ParameterType, obj);
					}
					throw new InvalidOperationException(System.SR.KeyedServicesNotSupported);
				}
				return serviceProviderIsService.IsService(parameterInfo.ParameterType);
			}

			public object GetService(IServiceProvider serviceProvider, int parameterIndex)
			{
				ParameterInfo parameterInfo = Parameters[parameterIndex];
				object[] parameterKeys = _parameterKeys;
				object obj = ((parameterKeys != null) ? parameterKeys[parameterIndex] : null);
				if (obj != null)
				{
					if (serviceProvider is IKeyedServiceProvider keyedServiceProvider)
					{
						return keyedServiceProvider.GetKeyedService(parameterInfo.ParameterType, obj);
					}
					throw new InvalidOperationException(System.SR.KeyedServicesNotSupported);
				}
				return serviceProvider.GetService(parameterInfo.ParameterType);
			}
		}

		private readonly ref struct ConstructorMatcher
		{
			private readonly ConstructorInfoEx _constructor;

			private readonly object[] _parameterValues;

			public ConstructorInfoEx ConstructorInfo => _constructor;

			public ConstructorMatcher(ConstructorInfoEx constructor, object[] parameterValues)
			{
				_constructor = constructor;
				_parameterValues = parameterValues;
			}

			public int Match(object[] givenParameters, IServiceProviderIsService serviceProviderIsService)
			{
				for (int i = 0; i < givenParameters.Length; i++)
				{
					Type c = givenParameters[i]?.GetType();
					bool flag = false;
					for (int j = 0; j < _constructor.Parameters.Length; j++)
					{
						if (_parameterValues[j] == null && _constructor.Parameters[j].ParameterType.IsAssignableFrom(c))
						{
							flag = true;
							_parameterValues[j] = givenParameters[i];
							break;
						}
					}
					if (!flag)
					{
						return -1;
					}
				}
				for (int k = 0; k < _constructor.Parameters.Length; k++)
				{
					if (_parameterValues[k] == null && !_constructor.IsService(serviceProviderIsService, k))
					{
						if (!ParameterDefaultValue.TryGetDefaultValue(_constructor.Parameters[k], out object defaultValue))
						{
							return -1;
						}
						_parameterValues[k] = defaultValue;
					}
				}
				return _constructor.Parameters.Length;
			}

			public object CreateInstance(IServiceProvider provider)
			{
				for (int i = 0; i < _constructor.Parameters.Length; i++)
				{
					if (_parameterValues[i] != null)
					{
						continue;
					}
					object service = _constructor.GetService(provider, i);
					if (service == null)
					{
						if (!ParameterDefaultValue.TryGetDefaultValue(_constructor.Parameters[i], out object defaultValue))
						{
							throw new InvalidOperationException(System.SR.Format(System.SR.UnableToResolveService, _constructor.Parameters[i].ParameterType, _constructor.Info.DeclaringType));
						}
						_parameterValues[i] = defaultValue;
					}
					else
					{
						_parameterValues[i] = service;
					}
				}
				try
				{
					return _constructor.Info.Invoke(_parameterValues);
				}
				catch (TargetInvocationException ex) when (ex.InnerException != null)
				{
					ExceptionDispatchInfo.Capture(ex.InnerException).Throw();
					throw;
				}
			}

			public void MapParameters(int?[] parameterMap, object[] givenParameters)
			{
				for (int i = 0; i < _constructor.Parameters.Length; i++)
				{
					if (parameterMap[i].HasValue)
					{
						_parameterValues[i] = givenParameters[parameterMap[i].Value];
					}
				}
			}
		}

		private static readonly MethodInfo GetServiceInfo = new Func<IServiceProvider, Type, Type, bool, object, object>(GetService).Method;

		public static object CreateInstance(IServiceProvider provider, [DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicConstructors)] Type instanceType, params object[] parameters)
		{
			ExceptionPolyfills.ThrowIfNull(provider, "provider");
			if (instanceType.IsAbstract)
			{
				throw new InvalidOperationException(System.SR.CannotCreateAbstractClasses);
			}
			ConstructorInfoEx[] array = CreateConstructorInfoExs(instanceType);
			object[] ctorArgs = null;
			object[] array2 = null;
			ConstructorMatcher constructorMatcher = default(ConstructorMatcher);
			IServiceProviderIsService service = provider.GetService<IServiceProviderIsService>();
			ConstructorInfoEx constructorInfoEx;
			if (service != null)
			{
				for (int i = 0; i < array.Length; i++)
				{
					constructorInfoEx = array[i];
					if (!constructorInfoEx.IsPreferred)
					{
						continue;
					}
					for (int j = i + 1; j < array.Length; j++)
					{
						if (array[j].IsPreferred)
						{
							ThrowMultipleCtorsMarkedWithAttributeException();
						}
					}
					InitializeCtorArgValues(ref ctorArgs, constructorInfoEx.Parameters.Length);
					constructorMatcher = new ConstructorMatcher(constructorInfoEx, ctorArgs);
					if (constructorMatcher.Match(parameters, service) == -1)
					{
						ThrowMarkedCtorDoesNotTakeAllProvidedArguments();
					}
					return constructorMatcher.CreateInstance(provider);
				}
				int num = -1;
				ConstructorMatcher constructorMatcher2 = default(ConstructorMatcher);
				bool flag = false;
				for (int k = 0; k < array.Length; k++)
				{
					constructorInfoEx = array[k];
					InitializeCtorArgValues(ref ctorArgs, constructorInfoEx.Parameters.Length);
					constructorMatcher = new ConstructorMatcher(constructorInfoEx, ctorArgs);
					int num2 = constructorMatcher.Match(parameters, service);
					if (num < num2)
					{
						num = num2;
						if (k == array.Length - 1)
						{
							array2 = ctorArgs;
						}
						else
						{
							array2 = new object[num2];
							ctorArgs.CopyTo(array2, 0);
						}
						constructorMatcher2 = new ConstructorMatcher(constructorMatcher.ConstructorInfo, array2);
						flag = false;
					}
					else if (num == num2)
					{
						flag = true;
					}
				}
				if (num != -1)
				{
					if (flag)
					{
						throw new InvalidOperationException(System.SR.Format(System.SR.MultipleCtorsFoundWithBestLength, instanceType, num));
					}
					return constructorMatcher2.CreateInstance(provider);
				}
			}
			Type[] array3;
			if (parameters.Length == 0)
			{
				array3 = Type.EmptyTypes;
			}
			else
			{
				array3 = new Type[parameters.Length];
				for (int l = 0; l < array3.Length; l++)
				{
					array3[l] = parameters[l]?.GetType();
				}
			}
			FindApplicableConstructor(instanceType, array3, array, out var matchingConstructor, out var matchingParameterMap);
			constructorInfoEx = FindConstructorEx(matchingConstructor, array);
			InitializeCtorArgValues(ref ctorArgs, constructorInfoEx.Parameters.Length);
			constructorMatcher = new ConstructorMatcher(constructorInfoEx, ctorArgs);
			constructorMatcher.MapParameters(matchingParameterMap, parameters);
			return constructorMatcher.CreateInstance(provider);
			static void InitializeCtorArgValues(ref object[] reference, int length)
			{
				if (reference != null && reference.Length == length)
				{
					Array.Clear(reference, 0, length);
				}
				else
				{
					reference = new object[length];
				}
			}
		}

		private static ConstructorInfoEx[] CreateConstructorInfoExs([DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicConstructors)] Type type)
		{
			ConstructorInfo[] constructors = type.GetConstructors();
			ConstructorInfoEx[] array = new ConstructorInfoEx[constructors.Length];
			for (int i = 0; i < constructors.Length; i++)
			{
				array[i] = new ConstructorInfoEx(constructors[i]);
			}
			return array;
		}

		public static ObjectFactory CreateFactory([DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicConstructors)] Type instanceType, Type[] argumentTypes)
		{
			if (!RuntimeFeature.IsDynamicCodeCompiled)
			{
				return CreateFactoryReflection(instanceType, argumentTypes);
			}
			CreateFactoryInternal(instanceType, argumentTypes, out var provider, out var argumentArray, out var factoryExpressionBody);
			return Expression.Lambda<ObjectFactory>(factoryExpressionBody, new ParameterExpression[2] { provider, argumentArray }).Compile();
		}

		public static ObjectFactory<T> CreateFactory<[DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicConstructors)] T>(Type[] argumentTypes)
		{
			if (!RuntimeFeature.IsDynamicCodeCompiled)
			{
				ObjectFactory factory = CreateFactoryReflection(typeof(T), argumentTypes);
				return (IServiceProvider serviceProvider, object[] arguments) => (T)factory(serviceProvider, arguments);
			}
			CreateFactoryInternal(typeof(T), argumentTypes, out var provider, out var argumentArray, out var factoryExpressionBody);
			return Expression.Lambda<ObjectFactory<T>>(factoryExpressionBody, new ParameterExpression[2] { provider, argumentArray }).Compile();
		}

		private static void CreateFactoryInternal([DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicConstructors)] Type instanceType, Type[] argumentTypes, out ParameterExpression provider, out ParameterExpression argumentArray, out Expression factoryExpressionBody)
		{
			FindApplicableConstructor(instanceType, argumentTypes, null, out var matchingConstructor, out var matchingParameterMap);
			provider = Expression.Parameter(typeof(IServiceProvider), "provider");
			argumentArray = Expression.Parameter(typeof(object[]), "argumentArray");
			factoryExpressionBody = BuildFactoryExpression(matchingConstructor, matchingParameterMap, provider, argumentArray);
		}

		public static T CreateInstance<[DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicConstructors)] T>(IServiceProvider provider, params object[] parameters)
		{
			return (T)CreateInstance(provider, typeof(T), parameters);
		}

		public static T GetServiceOrCreateInstance<[DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicConstructors)] T>(IServiceProvider provider)
		{
			return (T)GetServiceOrCreateInstance(provider, typeof(T));
		}

		public static object GetServiceOrCreateInstance(IServiceProvider provider, [DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicConstructors)] Type type)
		{
			return provider.GetService(type) ?? CreateInstance(provider, type);
		}

		private static object GetService(IServiceProvider sp, Type type, Type requiredBy, bool hasDefaultValue, object key)
		{
			object obj = ((key == null) ? sp.GetService(type) : GetKeyedService(sp, type, key));
			if (obj == null && !hasDefaultValue)
			{
				ThrowHelperUnableToResolveService(type, requiredBy);
			}
			return obj;
		}

		[DoesNotReturn]
		private static void ThrowHelperUnableToResolveService(Type type, Type requiredBy)
		{
			throw new InvalidOperationException(System.SR.Format(System.SR.UnableToResolveService, type, requiredBy));
		}

		private static BlockExpression BuildFactoryExpression(ConstructorInfo constructor, int?[] parameterMap, Expression serviceProvider, Expression factoryArgumentArray)
		{
			ParameterInfo[] parameters = constructor.GetParameters();
			Expression[] array = new Expression[parameters.Length];
			for (int i = 0; i < parameters.Length; i++)
			{
				ParameterInfo parameterInfo = parameters[i];
				Type parameterType = parameterInfo.ParameterType;
				object defaultValue;
				bool flag = ParameterDefaultValue.TryGetDefaultValue(parameterInfo, out defaultValue);
				if (parameterMap[i].HasValue)
				{
					array[i] = Expression.ArrayAccess(factoryArgumentArray, Expression.Constant(parameterMap[i]));
				}
				else
				{
					FromKeyedServicesAttribute fromKeyedServicesAttribute = (FromKeyedServicesAttribute)Attribute.GetCustomAttribute(parameterInfo, typeof(FromKeyedServicesAttribute), inherit: false);
					Expression[] arguments = new Expression[5]
					{
						serviceProvider,
						Expression.Constant(parameterType, typeof(Type)),
						Expression.Constant(constructor.DeclaringType, typeof(Type)),
						Expression.Constant(flag),
						Expression.Constant(fromKeyedServicesAttribute?.Key, typeof(object))
					};
					array[i] = Expression.Call(GetServiceInfo, arguments);
				}
				if (flag)
				{
					ConstantExpression right = Expression.Constant(defaultValue);
					array[i] = Expression.Coalesce(array[i], right);
				}
				array[i] = Expression.Convert(array[i], parameterType);
			}
			return Expression.Block(Expression.IfThen(Expression.Equal(serviceProvider, Expression.Constant(null)), Expression.Throw(Expression.Constant(new ArgumentNullException("serviceProvider")))), Expression.New(constructor, array));
		}

		private static ObjectFactory CreateFactoryReflection([DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicConstructors)] Type instanceType, Type[] argumentTypes)
		{
			FindApplicableConstructor(instanceType, argumentTypes, null, out var constructor, out var parameterMap);
			Type declaringType = constructor.DeclaringType;
			ParameterInfo[] constructorParameters = constructor.GetParameters();
			if (constructorParameters.Length == 0)
			{
				return (IServiceProvider serviceProvider, object[] arguments) => constructor.Invoke(BindingFlags.DoNotWrapExceptions, null, null, null);
			}
			FactoryParameterContext[] parameters = GetFactoryParameterContext();
			return (IServiceProvider serviceProvider, object[] arguments) => ReflectionFactoryCanonical(constructor, parameters, declaringType, serviceProvider, arguments);
			FactoryParameterContext[] GetFactoryParameterContext()
			{
				FactoryParameterContext[] array = new FactoryParameterContext[constructorParameters.Length];
				for (int i = 0; i < constructorParameters.Length; i++)
				{
					ParameterInfo parameterInfo = constructorParameters[i];
					FromKeyedServicesAttribute fromKeyedServicesAttribute = (FromKeyedServicesAttribute)Attribute.GetCustomAttribute(parameterInfo, typeof(FromKeyedServicesAttribute), inherit: false);
					object defaultValue;
					bool hasDefaultValue = ParameterDefaultValue.TryGetDefaultValue(parameterInfo, out defaultValue);
					array[i] = new FactoryParameterContext(parameterInfo.ParameterType, hasDefaultValue, defaultValue, parameterMap[i] ?? (-1), fromKeyedServicesAttribute?.Key);
				}
				return array;
			}
		}

		private static void FindApplicableConstructor([DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicConstructors)] Type instanceType, Type[] argumentTypes, ConstructorInfoEx[] constructors, out ConstructorInfo matchingConstructor, out int?[] matchingParameterMap)
		{
			if (!TryFindPreferredConstructor(instanceType, argumentTypes, constructors, out var matchingConstructor2, out var parameterMap) && !TryFindMatchingConstructor(instanceType, argumentTypes, out matchingConstructor2, out parameterMap))
			{
				throw new InvalidOperationException(System.SR.Format(System.SR.CtorNotLocated, instanceType));
			}
			matchingConstructor = matchingConstructor2;
			matchingParameterMap = parameterMap;
		}

		private static ConstructorInfoEx FindConstructorEx(ConstructorInfo constructorInfo, ConstructorInfoEx[] constructorExs)
		{
			for (int i = 0; i < constructorExs.Length; i++)
			{
				if ((object)constructorExs[i].Info == constructorInfo)
				{
					return constructorExs[i];
				}
			}
			return null;
		}

		private static bool TryFindMatchingConstructor([DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicConstructors)] Type instanceType, Type[] argumentTypes, [NotNullWhen(true)] out ConstructorInfo matchingConstructor, [NotNullWhen(true)] out int?[] parameterMap)
		{
			matchingConstructor = null;
			parameterMap = null;
			ConstructorInfo[] constructors = instanceType.GetConstructors();
			foreach (ConstructorInfo constructorInfo in constructors)
			{
				if (TryCreateParameterMap(constructorInfo.GetParameters(), argumentTypes, out var parameterMap2))
				{
					if (matchingConstructor != null)
					{
						throw new InvalidOperationException(System.SR.Format(System.SR.MultipleCtorsFound, instanceType));
					}
					matchingConstructor = constructorInfo;
					parameterMap = parameterMap2;
				}
			}
			if (matchingConstructor != null)
			{
				return true;
			}
			return false;
		}

		private static bool TryFindPreferredConstructor([DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicConstructors)] Type instanceType, Type[] argumentTypes, ConstructorInfoEx[] constructors, [NotNullWhen(true)] out ConstructorInfo matchingConstructor, [NotNullWhen(true)] out int?[] parameterMap)
		{
			bool flag = false;
			matchingConstructor = null;
			parameterMap = null;
			if (constructors == null)
			{
				constructors = CreateConstructorInfoExs(instanceType);
			}
			ConstructorInfoEx[] array = constructors;
			foreach (ConstructorInfoEx constructorInfoEx in array)
			{
				if (constructorInfoEx.IsPreferred)
				{
					if (flag)
					{
						ThrowMultipleCtorsMarkedWithAttributeException();
					}
					if (!TryCreateParameterMap(constructorInfoEx.Info.GetParameters(), argumentTypes, out var parameterMap2))
					{
						ThrowMarkedCtorDoesNotTakeAllProvidedArguments();
					}
					matchingConstructor = constructorInfoEx.Info;
					parameterMap = parameterMap2;
					flag = true;
				}
			}
			if (matchingConstructor != null)
			{
				return true;
			}
			return false;
		}

		private static bool TryCreateParameterMap(ParameterInfo[] constructorParameters, Type[] argumentTypes, out int?[] parameterMap)
		{
			parameterMap = new int?[constructorParameters.Length];
			for (int i = 0; i < argumentTypes.Length; i++)
			{
				bool flag = false;
				Type c = argumentTypes[i];
				for (int j = 0; j < constructorParameters.Length; j++)
				{
					if (!parameterMap[j].HasValue && constructorParameters[j].ParameterType.IsAssignableFrom(c))
					{
						flag = true;
						parameterMap[j] = i;
						break;
					}
				}
				if (!flag)
				{
					return false;
				}
			}
			return true;
		}

		private static void ThrowMultipleCtorsMarkedWithAttributeException()
		{
			throw new InvalidOperationException(System.SR.Format(System.SR.MultipleCtorsMarkedWithAttribute, "ActivatorUtilitiesConstructorAttribute"));
		}

		private static void ThrowMarkedCtorDoesNotTakeAllProvidedArguments()
		{
			throw new InvalidOperationException(System.SR.Format(System.SR.MarkedCtorMissingArgumentTypes, "ActivatorUtilitiesConstructorAttribute"));
		}

		private static object ReflectionFactoryCanonical(ConstructorInfo constructor, FactoryParameterContext[] parameters, Type declaringType, IServiceProvider serviceProvider, object[] arguments)
		{
			ExceptionPolyfills.ThrowIfNull(serviceProvider, "serviceProvider");
			object[] array = new object[parameters.Length];
			for (int i = 0; i < parameters.Length; i++)
			{
				ref FactoryParameterContext reference = ref parameters[i];
				array[i] = ((reference.ArgumentIndex != -1) ? arguments[reference.ArgumentIndex] : GetService(serviceProvider, reference.ParameterType, declaringType, reference.HasDefaultValue, reference.ServiceKey)) ?? reference.DefaultValue;
			}
			return constructor.Invoke(BindingFlags.DoNotWrapExceptions, null, array, null);
		}

		private static object GetKeyedService(IServiceProvider provider, Type type, object serviceKey)
		{
			ExceptionPolyfills.ThrowIfNull(provider, "provider");
			if (provider is IKeyedServiceProvider keyedServiceProvider)
			{
				return keyedServiceProvider.GetKeyedService(type, serviceKey);
			}
			throw new InvalidOperationException(System.SR.KeyedServicesNotSupported);
		}
	}
	[AttributeUsage(AttributeTargets.All)]
	public class ActivatorUtilitiesConstructorAttribute : Attribute
	{
	}
	[DebuggerDisplay("{ServiceProvider,nq}")]
	public readonly struct AsyncServiceScope : IServiceScope, IDisposable, IAsyncDisposable
	{
		private readonly IServiceScope _serviceScope;

		public IServiceProvider ServiceProvider => _serviceScope.ServiceProvider;

		public AsyncServiceScope(IServiceScope serviceScope)
		{
			ExceptionPolyfills.ThrowIfNull(serviceScope, "serviceScope");
			_serviceScope = serviceScope;
		}

		public void Dispose()
		{
			_serviceScope.Dispose();
		}

		public ValueTask DisposeAsync()
		{
			if (_serviceScope is IAsyncDisposable asyncDisposable)
			{
				return asyncDisposable.DisposeAsync();
			}
			_serviceScope.Dispose();
			return default(ValueTask);
		}
	}
	[AttributeUsage(AttributeTargets.Parameter)]
	public class FromKeyedServicesAttribute : Attribute
	{
		public object? Key { get; }

		public ServiceKeyLookupMode LookupMode { get; }

		public FromKeyedServicesAttribute(object? key)
		{
			Key = key;
			LookupMode = ((key == null) ? ServiceKeyLookupMode.NullKey : ServiceKeyLookupMode.ExplicitKey);
		}

		public FromKeyedServicesAttribute()
		{
			Key = null;
			LookupMode = ServiceKeyLookupMode.InheritKey;
		}
	}
	public interface IKeyedServiceProvider : IServiceProvider
	{
		object? GetKeyedService(Type serviceType, object? serviceKey);

		object GetRequiredKeyedService(Type serviceType, object? serviceKey);
	}
	public static class KeyedService
	{
		private sealed class AnyKeyObj
		{
			public override string ToString()
			{
				return "*";
			}
		}

		public static object AnyKey { get; } = new AnyKeyObj();
	}
	public interface IServiceCollection : IList<ServiceDescriptor>, ICollection<ServiceDescriptor>, IEnumerable<ServiceDescriptor>, IEnumerable
	{
	}
	public interface IServiceProviderFactory<TContainerBuilder> where TContainerBuilder : notnull
	{
		TContainerBuilder CreateBuilder(IServiceCollection services);

		IServiceProvider CreateServiceProvider(TContainerBuilder containerBuilder);
	}
	public interface IServiceProviderIsKeyedService : IServiceProviderIsService
	{
		bool IsKeyedService(Type serviceType, object? serviceKey);
	}
	public interface IServiceProviderIsService
	{
		bool IsService(Type serviceType);
	}
	public interface IServiceScope : IDisposable
	{
		IServiceProvider ServiceProvider { get; }
	}
	public interface IServiceScopeFactory
	{
		IServiceScope CreateScope();
	}
	public interface ISupportRequiredService
	{
		object GetRequiredService(Type serviceType);
	}
	public delegate object ObjectFactory(IServiceProvider serviceProvider, object?[]? arguments);
	public delegate T ObjectFactory<out T>(IServiceProvider serviceProvider, object?[]? arguments);
	[DebuggerDisplay("{DebuggerToString(),nq}")]
	[DebuggerTypeProxy(typeof(ServiceCollectionDebugView))]
	public class ServiceCollection : IServiceCollection, IList<ServiceDescriptor>, ICollection<ServiceDescriptor>, IEnumerable<ServiceDescriptor>, IEnumerable
	{
		private sealed class ServiceCollectionDebugView
		{
			private readonly ServiceCollection _services;

			[DebuggerBrowsable(DebuggerBrowsableState.RootHidden)]
			public ServiceDescriptor[] Items
			{
				get
				{
					ServiceDescriptor[] array = new ServiceDescriptor[_services.Count];
					_services.CopyTo(array, 0);
					return array;
				}
			}

			public ServiceCollectionDebugView(ServiceCollection services)
			{
				_services = services;
			}
		}

		private readonly List<ServiceDescriptor> _descriptors = new List<ServiceDescriptor>();

		private bool _isReadOnly;

		public int Count => _descriptors.Count;

		public bool IsReadOnly => _isReadOnly;

		public ServiceDescriptor this[int index]
		{
			get
			{
				return _descriptors[index];
			}
			set
			{
				CheckReadOnly();
				_descriptors[index] = value;
			}
		}

		public void Clear()
		{
			CheckReadOnly();
			_descriptors.Clear();
		}

		public bool Contains(ServiceDescriptor item)
		{
			return _descriptors.Contains(item);
		}

		public void CopyTo(ServiceDescriptor[] array, int arrayIndex)
		{
			_descriptors.CopyTo(array, arrayIndex);
		}

		public bool Remove(ServiceDescriptor item)
		{
			CheckReadOnly();
			return _descriptors.Remove(item);
		}

		public IEnumerator<ServiceDescriptor> GetEnumerator()
		{
			return _descriptors.GetEnumerator();
		}

		void ICollection<ServiceDescriptor>.Add(ServiceDescriptor item)
		{
			CheckReadOnly();
			_descriptors.Add(item);
		}

		IEnumerator IEnumerable.GetEnumerator()
		{
			return GetEnumerator();
		}

		public int IndexOf(ServiceDescriptor item)
		{
			return _descriptors.IndexOf(item);
		}

		public void Insert(int index, ServiceDescriptor item)
		{
			CheckReadOnly();
			_descriptors.Insert(index, item);
		}

		public void RemoveAt(int index)
		{
			CheckReadOnly();
			_descriptors.RemoveAt(index);
		}

		public void MakeReadOnly()
		{
			_isReadOnly = true;
		}

		private void CheckReadOnly()
		{
			if (_isReadOnly)
			{
				ThrowReadOnlyException();
			}
		}

		private static void ThrowReadOnlyException()
		{
			throw new InvalidOperationException(System.SR.ServiceCollectionReadOnly);
		}

		private string DebuggerToString()
		{
			string text = $"Count = {_descriptors.Count}";
			if (_isReadOnly)
			{
				text += ", IsReadOnly = true";
			}
			return text;
		}
	}
	public static class ServiceCollectionServiceExtensions
	{
		public static IServiceCollection AddTransient(this IServiceCollection services, Type serviceType, [DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicConstructors)] Type implementationType)
		{
			ExceptionPolyfills.ThrowIfNull(services, "services");
			ExceptionPolyfills.ThrowIfNull(serviceType, "serviceType");
			ExceptionPolyfills.ThrowIfNull(implementationType, "implementationType");
			return Add(services, serviceType, implementationType, ServiceLifetime.Transient);
		}

		public static IServiceCollection AddTransient(this IServiceCollection services, Type serviceType, Func<IServiceProvider, object> implementationFactory)
		{
			ExceptionPolyfills.ThrowIfNull(services, "services");
			ExceptionPolyfills.ThrowIfNull(serviceType, "serviceType");
			ExceptionPolyfills.ThrowIfNull(implementationFactory, "implementationFactory");
			return Add(services, serviceType, implementationFactory, ServiceLifetime.Transient);
		}

		public static IServiceCollection AddTransient<TService, [DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicConstructors)] TImplementation>(this IServiceCollection services) where TService : class where TImplementation : class, TService
		{
			ExceptionPolyfills.ThrowIfNull(services, "services");
			return services.AddTransient(typeof(TService), typeof(TImplementation));
		}

		public static IServiceCollection AddTransient(this IServiceCollection services, [DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicConstructors)] Type serviceType)
		{
			ExceptionPolyfills.ThrowIfNull(services, "services");
			ExceptionPolyfills.ThrowIfNull(serviceType, "serviceType");
			return services.AddTransient(serviceType, serviceType);
		}

		public static IServiceCollection AddTransient<[DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicConstructors)] TService>(this IServiceCollection services) where TService : class
		{
			ExceptionPolyfills.ThrowIfNull(services, "services");
			return services.AddTransient(typeof(TService));
		}

		public static IServiceCollection AddTransient<TService>(this IServiceCollection services, Func<IServiceProvider, TService> implementationFactory) where TService : class
		{
			ExceptionPolyfills.ThrowIfNull(services, "services");
			ExceptionPolyfills.ThrowIfNull(implementationFactory, "implementationFactory");
			return services.AddTransient(typeof(TService), implementationFactory);
		}

		public static IServiceCollection AddTransient<TService, TImplementation>(this IServiceCollection services, Func<IServiceProvider, TImplementation> implementationFactory) where TService : class where TImplementation : class, TService
		{
			ExceptionPolyfills.ThrowIfNull(services, "services");
			ExceptionPolyfills.ThrowIfNull(implementationFactory, "implementationFactory");
			return services.AddTransient(typeof(TService), implementationFactory);
		}

		public static IServiceCollection AddScoped(this IServiceCollection services, Type serviceType, [DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicConstructors)] Type implementationType)
		{
			ExceptionPolyfills.ThrowIfNull(services, "services");
			ExceptionPolyfills.ThrowIfNull(serviceType, "serviceType");
			ExceptionPolyfills.ThrowIfNull(implementationType, "implementationType");
			return Add(services, serviceType, implementationType, ServiceLifetime.Scoped);
		}

		public static IServiceCollection AddScoped(this IServiceCollection services, Type serviceType, Func<IServiceProvider, object> implementationFactory)
		{
			ExceptionPolyfills.ThrowIfNull(services, "services");
			ExceptionPolyfills.ThrowIfNull(serviceType, "serviceType");
			ExceptionPolyfills.ThrowIfNull(implementationFactory, "implementationFactory");
			return Add(services, serviceType, implementationFactory, ServiceLifetime.Scoped);
		}

		public static IServiceCollection AddScoped<TService, [DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicConstructors)] TImplementation>(this IServiceCollection services) where TService : class where TImplementation : class, TService
		{
			ExceptionPolyfills.ThrowIfNull(services, "services");
			return services.AddScoped(typeof(TService), typeof(TImplementation));
		}

		public static IServiceCollection AddScoped(this IServiceCollection services, [DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicConstructors)] Type serviceType)
		{
			ExceptionPolyfills.ThrowIfNull(services, "services");
			ExceptionPolyfills.ThrowIfNull(serviceType, "serviceType");
			return services.AddScoped(serviceType, serviceType);
		}

		public static IServiceCollection AddScoped<[DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicConstructors)] TService>(this IServiceCollection services) where TService : class
		{
			ExceptionPolyfills.ThrowIfNull(services, "services");
			return services.AddScoped(typeof(TService));
		}

		public static IServiceCollection AddScoped<TService>(this IServiceCollection services, Func<IServiceProvider, TService> implementationFactory) where TService : class
		{
			ExceptionPolyfills.ThrowIfNull(services, "services");
			ExceptionPolyfills.ThrowIfNull(implementationFactory, "implementationFactory");
			return services.AddScoped(typeof(TService), implementationFactory);
		}

		public static IServiceCollection AddScoped<TService, TImplementation>(this IServiceCollection services, Func<IServiceProvider, TImplementation> implementationFactory) where TService : class where TImplementation : class, TService
		{
			ExceptionPolyfills.ThrowIfNull(services, "services");
			ExceptionPolyfills.ThrowIfNull(implementationFactory, "implementationFactory");
			return services.AddScoped(typeof(TService), implementationFactory);
		}

		public static IServiceCollection AddSingleton(this IServiceCollection services, Type serviceType, [DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicConstructors)] Type implementationType)
		{
			ExceptionPolyfills.ThrowIfNull(services, "services");
			ExceptionPolyfills.ThrowIfNull(serviceType, "serviceType");
			ExceptionPolyfills.ThrowIfNull(implementationType, "implementationType");
			return Add(services, serviceType, implementationType, ServiceLifetime.Singleton);
		}

		public static IServiceCollection AddSingleton(this IServiceCollection services, Type serviceType, Func<IServiceProvider, object> implementationFactory)
		{
			ExceptionPolyfills.ThrowIfNull(services, "services");
			ExceptionPolyfills.ThrowIfNull(serviceType, "serviceType");
			ExceptionPolyfills.ThrowIfNull(implementationFactory, "implementationFactory");
			return Add(services, serviceType, implementationFactory, ServiceLifetime.Singleton);
		}

		public static IServiceCollection AddSingleton<TService, [DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicConstructors)] TImplementation>(this IServiceCollection services) where TService : class where TImplementation : class, TService
		{
			ExceptionPolyfills.ThrowIfNull(services, "services");
			return services.AddSingleton(typeof(TService), typeof(TImplementation));
		}

		public static IServiceCollection AddSingleton(this IServiceCollection services, [DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicConstructors)] Type serviceType)
		{
			ExceptionPolyfills.ThrowIfNull(services, "services");
			ExceptionPolyfills.ThrowIfNull(serviceType, "serviceType");
			return services.AddSingleton(serviceType, serviceType);
		}

		public static IServiceCollection AddSingleton<[DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicConstructors)] TService>(this IServiceCollection services) where TService : class
		{
			ExceptionPolyfills.ThrowIfNull(services, "services");
			return services.AddSingleton(typeof(TService));
		}

		public static IServiceCollection AddSingleton<TService>(this IServiceCollection services, Func<IServiceProvider, TService> implementationFactory) where TService : class
		{
			ExceptionPolyfills.ThrowIfNull(services, "services");
			ExceptionPolyfills.ThrowIfNull(implementationFactory, "implementationFactory");
			return services.AddSingleton(typeof(TService), implementationFactory);
		}

		public static IServiceCollection AddSingleton<TService, TImplementation>(this IServiceCollection services, Func<IServiceProvider, TImplementation> implementationFactory) where TService : class where TImplementation : class, TService
		{
			ExceptionPolyfills.ThrowIfNull(services, "services");
			ExceptionPolyfills.ThrowIfNull(implementationFactory, "implementationFactory");
			return services.AddSingleton(typeof(TService), implementationFactory);
		}

		public static IServiceCollection AddSingleton(this IServiceCollection services, Type serviceType, object implementationInstance)
		{
			ExceptionPolyfills.ThrowIfNull(services, "services");
			ExceptionPolyfills.ThrowIfNull(serviceType, "serviceType");
			ExceptionPolyfills.ThrowIfNull(implementationInstance, "implementationInstance");
			ServiceDescriptor item = new ServiceDescriptor(serviceType, implementationInstance);
			services.Add(item);
			return services;
		}

		public static IServiceCollection AddSingleton<TService>(this IServiceCollection services, TService implementationInstance) where TService : class
		{
			ExceptionPolyfills.ThrowIfNull(services, "services");
			ExceptionPolyfills.ThrowIfNull(implementationInstance, "implementationInstance");
			return services.AddSingleton(typeof(TService), implementationInstance);
		}

		private static IServiceCollection Add(IServiceCollection collection, Type serviceType, [DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicConstructors)] Type implementationType, ServiceLifetime lifetime)
		{
			ServiceDescriptor item = new ServiceDescriptor(serviceType, implementationType, lifetime);
			collection.Add(item);
			return collection;
		}

		private static IServiceCollection Add(IServiceCollection collection, Type serviceType, Func<IServiceProvider, object> implementationFactory, ServiceLifetime lifetime)
		{
			ServiceDescriptor item = new ServiceDescriptor(serviceType, implementationFactory, lifetime);
			collection.Add(item);
			return collection;
		}

		public static IServiceCollection AddKeyedTransient(this IServiceCollection services, Type serviceType, object? serviceKey, [DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicConstructors)] Type implementationType)
		{
			ExceptionPolyfills.ThrowIfNull(services, "services");
			ExceptionPolyfills.ThrowIfNull(serviceType, "serviceType");
			ExceptionPolyfills.ThrowIfNull(implementationType, "implementationType");
			return AddKeyed(services, serviceType, serviceKey, implementationType, ServiceLifetime.Transient);
		}

		public static IServiceCollection AddKeyedTransient(this IServiceCollection services, Type serviceType, object? serviceKey, Func<IServiceProvider, object?, object> implementationFactory)
		{
			ExceptionPolyfills.ThrowIfNull(services, "services");
			ExceptionPolyfills.ThrowIfNull(serviceType, "serviceType");
			ExceptionPolyfills.ThrowIfNull(implementationFactory, "implementationFactory");
			return AddKeyed(services, serviceType, serviceKey, implementationFactory, ServiceLifetime.Transient);
		}

		public static IServiceCollection AddKeyedTransient<TService, [DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicConstructors)] TImplementation>(this IServiceCollection services, object? serviceKey) where TService : class where TImplementation : class, TService
		{
			ExceptionPolyfills.ThrowIfNull(services, "services");
			return services.AddKeyedTransient(typeof(TService), serviceKey, typeof(TImplementation));
		}

		public static IServiceCollection AddKeyedTransient(this IServiceCollection services, [DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicConstructors)] Type serviceType, object? serviceKey)
		{
			ExceptionPolyfills.ThrowIfNull(services, "services");
			ExceptionPolyfills.ThrowIfNull(serviceType, "serviceType");
			return services.AddKeyedTransient(serviceType, serviceKey, serviceType);
		}

		public static IServiceCollection AddKeyedTransient<[DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicConstructors)] TService>(this IServiceCollection services, object? serviceKey) where TService : class
		{
			ExceptionPolyfills.ThrowIfNull(services, "services");
			return services.AddKeyedTransient(typeof(TService), serviceKey);
		}

		public static IServiceCollection AddKeyedTransient<TService>(this IServiceCollection services, object? serviceKey, Func<IServiceProvider, object?, TService> implementationFactory) where TService : class
		{
			ExceptionPolyfills.ThrowIfNull(services, "services");
			ExceptionPolyfills.ThrowIfNull(implementationFactory, "implementationFactory");
			return services.AddKeyedTransient(typeof(TService), serviceKey, implementationFactory);
		}

		public static IServiceCollection AddKeyedTransient<TService, TImplementation>(this IServiceCollection services, object? serviceKey, Func<IServiceProvider, object?, TImplementation> implementationFactory) where TService : class where TImplementation : class, TService
		{
			ExceptionPolyfills.ThrowIfNull(services, "services");
			ExceptionPolyfills.ThrowIfNull(implementationFactory, "implementationFactory");
			return services.AddKeyedTransient(typeof(TService), serviceKey, implementationFactory);
		}

		public static IServiceCollection AddKeyedScoped(this IServiceCollection services, Type serviceType, object? serviceKey, [DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicConstructors)] Type implementationType)
		{
			ExceptionPolyfills.ThrowIfNull(services, "services");
			ExceptionPolyfills.ThrowIfNull(serviceType, "serviceType");
			ExceptionPolyfills.ThrowIfNull(implementationType, "implementationType");
			return AddKeyed(services, serviceType, serviceKey, implementationType, ServiceLifetime.Scoped);
		}

		public static IServiceCollection AddKeyedScoped(this IServiceCollection services, Type serviceType, object? serviceKey, Func<IServiceProvider, object?, object> implementationFactory)
		{
			ExceptionPolyfills.ThrowIfNull(services, "services");
			ExceptionPolyfills.ThrowIfNull(serviceType, "serviceType");
			ExceptionPolyfills.ThrowIfNull(implementationFactory, "implementationFactory");
			return AddKeyed(services, serviceType, serviceKey, implementationFactory, ServiceLifetime.Scoped);
		}

		public static IServiceCollection AddKeyedScoped<TService, [DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicConstructors)] TImplementation>(this IServiceCollection services, object? serviceKey) where TService : class where TImplementation : class, TService
		{
			ExceptionPolyfills.ThrowIfNull(services, "services");
			return services.AddKeyedScoped(typeof(TService), serviceKey, typeof(TImplementation));
		}

		public static IServiceCollection AddKeyedScoped(this IServiceCollection services, [DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicConstructors)] Type serviceType, object? serviceKey)
		{
			ExceptionPolyfills.ThrowIfNull(services, "services");
			ExceptionPolyfills.ThrowIfNull(serviceType, "serviceType");
			return services.AddKeyedScoped(serviceType, serviceKey, serviceType);
		}

		public static IServiceCollection AddKeyedScoped<[DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicConstructors)] TService>(this IServiceCollection services, object? serviceKey) where TService : class
		{
			ExceptionPolyfills.ThrowIfNull(services, "services");
			return services.AddKeyedScoped(typeof(TService), serviceKey);
		}

		public static IServiceCollection AddKeyedScoped<TService>(this IServiceCollection services, object? serviceKey, Func<IServiceProvider, object?, TService> implementationFactory) where TService : class
		{
			ExceptionPolyfills.ThrowIfNull(services, "services");
			ExceptionPolyfills.ThrowIfNull(implementationFactory, "implementationFactory");
			return services.AddKeyedScoped(typeof(TService), serviceKey, implementationFactory);
		}

		public static IServiceCollection AddKeyedScoped<TService, TImplementation>(this IServiceCollection services, object? serviceKey, Func<IServiceProvider, object?, TImplementation> implementationFactory) where TService : class where TImplementation : class, TService
		{
			ExceptionPolyfills.ThrowIfNull(services, "services");
			ExceptionPolyfills.ThrowIfNull(implementationFactory, "implementationFactory");
			return services.AddKeyedScoped(typeof(TService), serviceKey, implementationFactory);
		}

		public static IServiceCollection AddKeyedSingleton(this IServiceCollection services, Type serviceType, object? serviceKey, [DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicConstructors)] Type implementationType)
		{
			ExceptionPolyfills.ThrowIfNull(services, "services");
			ExceptionPolyfills.ThrowIfNull(serviceType, "serviceType");
			ExceptionPolyfills.ThrowIfNull(implementationType, "implementationType");
			return AddKeyed(services, serviceType, serviceKey, implementationType, ServiceLifetime.Singleton);
		}

		public static IServiceCollection AddKeyedSingleton(this IServiceCollection services, Type serviceType, object? serviceKey, Func<IServiceProvider, object?, object> implementationFactory)
		{
			ExceptionPolyfills.ThrowIfNull(services, "services");
			ExceptionPolyfills.ThrowIfNull(serviceType, "serviceType");
			ExceptionPolyfills.ThrowIfNull(implementationFactory, "implementationFactory");
			return AddKeyed(services, serviceType, serviceKey, implementationFactory, ServiceLifetime.Singleton);
		}

		public static IServiceCollection AddKeyedSingleton<TService, [DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicConstructors)] TImplementation>(this IServiceCollection services, object? serviceKey) where TService : class where TImplementation : class, TService
		{
			ExceptionPolyfills.ThrowIfNull(services, "services");
			return services.AddKeyedSingleton(typeof(TService), serviceKey, typeof(TImplementation));
		}

		public static IServiceCollection AddKeyedSingleton(this IServiceCollection services, [DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicConstructors)] Type serviceType, object? serviceKey)
		{
			ExceptionPolyfills.ThrowIfNull(services, "services");
			ExceptionPolyfills.ThrowIfNull(serviceType, "serviceType");
			return services.AddKeyedSingleton(serviceType, serviceKey, serviceType);
		}

		public static IServiceCollection AddKeyedSingleton<[DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicConstructors)] TService>(this IServiceCollection services, object? serviceKey) where TService : class
		{
			ExceptionPolyfills.ThrowIfNull(services, "services");
			return services.AddKeyedSingleton(typeof(TService), serviceKey, typeof(TService));
		}

		public static IServiceCollection AddKeyedSingleton<TService>(this IServiceCollection services, object? serviceKey, Func<IServiceProvider, object?, TService> implementationFactory) where TService : class
		{
			ExceptionPolyfills.ThrowIfNull(services, "services");
			ExceptionPolyfills.ThrowIfNull(implementationFactory, "implementationFactory");
			return services.AddKeyedSingleton(typeof(TService), serviceKey, implementationFactory);
		}

		public static IServiceCollection AddKeyedSingleton<TService, TImplementation>(this IServiceCollection services, object? serviceKey, Func<IServiceProvider, object?, TImplementation> implementationFactory) where TService : class where TImplementation : class, TService
		{
			ExceptionPolyfills.ThrowIfNull(services, "services");
			ExceptionPolyfills.ThrowIfNull(implementationFactory, "implementationFactory");
			return services.AddKeyedSingleton(typeof(TService), serviceKey, implementationFactory);
		}

		public static IServiceCollection AddKeyedSingleton(this IServiceCollection services, Type serviceType, object? serviceKey, object implementationInstance)
		{
			ExceptionPolyfills.ThrowIfNull(services, "services");
			ExceptionPolyfills.ThrowIfNull(serviceType, "serviceType");
			ExceptionPolyfills.ThrowIfNull(implementationInstance, "implementationInstance");
			ServiceDescriptor item = new ServiceDescriptor(serviceType, serviceKey, implementationInstance);
			services.Add(item);
			return services;
		}

		public static IServiceCollection AddKeyedSingleton<TService>(this IServiceCollection services, object? serviceKey, TService implementationInstance) where TService : class
		{
			ExceptionPolyfills.ThrowIfNull(services, "services");
			ExceptionPolyfills.ThrowIfNull(implementationInstance, "implementationInstance");
			return services.AddKeyedSingleton(typeof(TService), serviceKey, implementationInstance);
		}

		private static IServiceCollection AddKeyed(IServiceCollection collection, Type serviceType, object serviceKey, [DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicConstructors)] Type implementationType, ServiceLifetime lifetime)
		{
			ServiceDescriptor item = new ServiceDescriptor(serviceType, serviceKey, implementationType, lifetime);
			collection.Add(item);
			return collection;
		}

		private static IServiceCollection AddKeyed(IServiceCollection collection, Type serviceType, object serviceKey, Func<IServiceProvider, object, object> implementationFactory, ServiceLifetime lifetime)
		{
			ServiceDescriptor item = new ServiceDescriptor(serviceType, serviceKey, implementationFactory, lifetime);
			collection.Add(item);
			return collection;
		}
	}
	[DebuggerDisplay("{DebuggerToString(),nq}")]
	public class ServiceDescriptor
	{
		[DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicConstructors)]
		private Type _implementationType;

		private object _implementationInstance;

		private object _implementationFactory;

		public ServiceLifetime Lifetime { get; }

		public object? ServiceKey { get; }

		public Type ServiceType { get; }

		[DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicConstructors)]
		public Type? ImplementationType
		{
			get
			{
				if (!IsKeyedService)
				{
					return _implementationType;
				}
				return null;
			}
		}

		[DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicConstructors)]
		public Type? KeyedImplementationType
		{
			get
			{
				if (!IsKeyedService)
				{
					ThrowNonKeyedDescriptor();
				}
				return _implementationType;
			}
		}

		public object? ImplementationInstance
		{
			get
			{
				if (!IsKeyedService)
				{
					return _implementationInstance;
				}
				return null;
			}
		}

		public object? KeyedImplementationInstance
		{
			get
			{
				if (!IsKeyedService)
				{
					ThrowNonKeyedDescriptor();
				}
				return _implementationInstance;
			}
		}

		public Func<IServiceProvider, object>? ImplementationFactory
		{
			get
			{
				if (!IsKeyedService)
				{
					return (Func<IServiceProvider, object>)_implementationFactory;
				}
				return null;
			}
		}

		public Func<IServiceProvider, object?, object>? KeyedImplementationFactory
		{
			get
			{
				if (!IsKeyedService)
				{
					ThrowNonKeyedDescriptor();
				}
				return (Func<IServiceProvider, object, object>)_implementationFactory;
			}
		}

		public bool IsKeyedService => ServiceKey != null;

		public ServiceDescriptor(Type serviceType, [DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicConstructors)] Type implementationType, ServiceLifetime lifetime)
			: this(serviceType, null, implementationType, lifetime)
		{
		}

		public ServiceDescriptor(Type serviceType, object? serviceKey, [DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicConstructors)] Type implementationType, ServiceLifetime lifetime)
			: this(serviceType, serviceKey, lifetime)
		{
			ExceptionPolyfills.ThrowIfNull(serviceType, "serviceType");
			ExceptionPolyfills.ThrowIfNull(implementationType, "implementationType");
			_implementationType = implementationType;
		}

		public ServiceDescriptor(Type serviceType, object instance)
			: this(serviceType, null, instance)
		{
		}

		public ServiceDescriptor(Type serviceType, object? serviceKey, object instance)
			: this(serviceType, serviceKey, ServiceLifetime.Singleton)
		{
			ExceptionPolyfills.ThrowIfNull(serviceType, "serviceType");
			ExceptionPolyfills.ThrowIfNull(instance, "instance");
			_implementationInstance = instance;
		}

		public ServiceDescriptor(Type serviceType, Func<IServiceProvider, object> factory, ServiceLifetime lifetime)
			: this(serviceType, (object)null, lifetime)
		{
			ExceptionPolyfills.ThrowIfNull(serviceType, "serviceType");
			ExceptionPolyfills.ThrowIfNull(factory, "factory");
			_implementationFactory = factory;
		}

		public ServiceDescriptor(Type serviceType, object? serviceKey, Func<IServiceProvider, object?, object> factory, ServiceLifetime lifetime)
			: this(serviceType, serviceKey, lifetime)
		{
			ExceptionPolyfills.ThrowIfNull(serviceType, "serviceType");
			ExceptionPolyfills.ThrowIfNull(factory, "factory");
			if (serviceKey == null)
			{
				Func<IServiceProvider, object> implementationFactory = (IServiceProvider sp) => factory(sp, null);
				_implementationFactory = implementationFactory;
			}
			else
			{
				_implementationFactory = factory;
			}
		}

		private ServiceDescriptor(Type serviceType, object serviceKey, ServiceLifetime lifetime)
		{
			Lifetime = lifetime;
			ServiceType = serviceType;
			ServiceKey = serviceKey;
		}

		public override string ToString()
		{
			string text = string.Format("{0}: {1} {2}: {3} ", "ServiceType", ServiceType, "Lifetime", Lifetime);
			if (IsKeyedService)
			{
				text += string.Format("{0}: {1} ", "ServiceKey", ServiceKey);
				if (KeyedImplementationType != null)
				{
					return text + string.Format("{0}: {1}", "KeyedImplementationType", KeyedImplementationType);
				}
				if (KeyedImplementationFactory != null)
				{
					MethodInfo method = KeyedImplementationFactory.Method;
					string text2 = method.DeclaringType?.FullName;
					string name = method.Name;
					return text + "KeyedImplementationFactory: " + text2 + "." + name;
				}
				return text + string.Format("{0}: {1}", "KeyedImplementationInstance", KeyedImplementationInstance);
			}
			if (ImplementationType != null)
			{
				return text + string.Format("{0}: {1}", "ImplementationType", ImplementationType);
			}
			if (ImplementationFactory != null)
			{
				MethodInfo method2 = ImplementationFactory.Method;
				string text3 = method2.DeclaringType?.FullName;
				string name2 = method2.Name;
				return text + "ImplementationFactory: " + text3 + "." + name2;
			}
			return text + string.Format("{0}: {1}", "ImplementationInstance", ImplementationInstance);
		}

		internal Type GetImplementationType()
		{
			if (ServiceKey == null)
			{
				if (ImplementationType != null)
				{
					return ImplementationType;
				}
				if (ImplementationInstance != null)
				{
					return ImplementationInstance.GetType();
				}
				if (ImplementationFactory != null)
				{
					return ImplementationFactory.GetType().GenericTypeArguments[1];
				}
			}
			else
			{
				if (KeyedImplementationType != null)
				{
					return KeyedImplementationType;
				}
				if (KeyedImplementationInstance != null)
				{
					return KeyedImplementationInstance.GetType();
				}
				if (KeyedImplementationFactory != null)
				{
					return KeyedImplementationFactory.GetType().GenericTypeArguments[2];
				}
			}
			return null;
		}

		public static ServiceDescriptor Transient<TService, [DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicConstructors)] TImplementation>() where TService : class where TImplementation : class, TService
		{
			return DescribeKeyed<TService, TImplementation>((object)null, ServiceLifetime.Transient);
		}

		public static ServiceDescriptor KeyedTransient<TService, [DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicConstructors)] TImplementation>(object? serviceKey) where TService : class where TImplementation : class, TService
		{
			return DescribeKeyed<TService, TImplementation>(serviceKey, ServiceLifetime.Transient);
		}

		public static ServiceDescriptor Transient(Type service, [DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicConstructors)] Type implementationType)
		{
			ExceptionPolyfills.ThrowIfNull(service, "service");
			ExceptionPolyfills.ThrowIfNull(implementationType, "implementationType");
			return Describe(service, implementationType, ServiceLifetime.Transient);
		}

		public static ServiceDescriptor KeyedTransient(Type service, object? serviceKey, [DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicConstructors)] Type implementationType)
		{
			ExceptionPolyfills.ThrowIfNull(service, "service");
			ExceptionPolyfills.ThrowIfNull(implementationType, "implementationType");
			return DescribeKeyed(service, serviceKey, implementationType, ServiceLifetime.Transient);
		}

		public static ServiceDescriptor Transient<TService, TImplementation>(Func<IServiceProvider, TImplementation> implementationFactory) where TService : class where TImplementation : class, TService
		{
			ExceptionPolyfills.ThrowIfNull(implementationFactory, "implementationFactory");
			return Describe(typeof(TService), implementationFactory, ServiceLifetime.Transient);
		}

		public static ServiceDescriptor KeyedTransient<TService, TImplementation>(object? serviceKey, Func<IServiceProvider, object?, TImplementation> implementationFactory) where TService : class where TImplementation : class, TService
		{
			ExceptionPolyfills.ThrowIfNull(implementationFactory, "implementationFactory");
			return DescribeKeyed(typeof(TService), serviceKey, implementationFactory, ServiceLifetime.Transient);
		}

		public static ServiceDescriptor Transient<TService>(Func<IServiceProvider, TService> implementationFactory) where TService : class
		{
			ExceptionPolyfills.ThrowIfNull(implementationFactory, "implementationFactory");
			return Describe(typeof(TService), implementationFactory, ServiceLifetime.Transient);
		}

		public static ServiceDescriptor KeyedTransient<TService>(object? serviceKey, Func<IServiceProvider, object?, TService> implementationFactory) where TService : class
		{
			ExceptionPolyfills.ThrowIfNull(implementationFactory, "implementationFactory");
			return DescribeKeyed(typeof(TService), serviceKey, implementationFactory, ServiceLifetime.Transient);
		}

		public static ServiceDescriptor Transient(Type service, Func<IServiceProvider, object> implementationFactory)
		{
			ExceptionPolyfills.ThrowIfNull(service, "service");
			ExceptionPolyfills.ThrowIfNull(implementationFactory, "implementationFactory");
			return Describe(service, implementationFactory, ServiceLifetime.Transient);
		}

		public static ServiceDescriptor KeyedTransient(Type service, object? serviceKey, Func<IServiceProvider, object?, object> implementationFactory)
		{
			ExceptionPolyfills.ThrowIfNull(service, "service");
			ExceptionPolyfills.ThrowIfNull(implementationFactory, "implementationFactory");
			return DescribeKeyed(service, serviceKey, implementationFactory, ServiceLifetime.Transient);
		}

		public static ServiceDescriptor Scoped<TService, [DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicConstructors)] TImplementation>() where TService : class where TImplementation : class, TService
		{
			return DescribeKeyed<TService, TImplementation>((object)null, ServiceLifetime.Scoped);
		}

		public static ServiceDescriptor KeyedScoped<TService, [DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicConstructors)] TImplementation>(object? serviceKey) where TService : class where TImplementation : class, TService
		{
			return DescribeKeyed<TService, TImplementation>(serviceKey, ServiceLifetime.Scoped);
		}

		public static ServiceDescriptor Scoped(Type service, [DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicConstructors)] Type implementationType)
		{
			return Describe(service, implementationType, ServiceLifetime.Scoped);
		}

		public static ServiceDescriptor KeyedScoped(Type service, object? serviceKey, [DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicConstructors)] Type implementationType)
		{
			return DescribeKeyed(service, serviceKey, implementationType, ServiceLifetime.Scoped);
		}

		public static ServiceDescriptor Scoped<TService, TImplementation>(Func<IServiceProvider, TImplementation> implementationFactory) where TService : class where TImplementation : class, TService
		{
			ExceptionPolyfills.ThrowIfNull(implementationFactory, "implementationFactory");
			return Describe(typeof(TService), implementationFactory, ServiceLifetime.Scoped);
		}

		public static ServiceDescriptor KeyedScoped<TService, TImplementation>(object? serviceKey, Func<IServiceProvider, object?, TImplementation> implementationFactory) where TService : class where TImplementation : class, TService
		{
			ExceptionPolyfills.ThrowIfNull(implementationFactory, "implementationFactory");
			return DescribeKeyed(typeof(TService), serviceKey, implementationFactory, ServiceLifetime.Scoped);
		}

		public static ServiceDescriptor Scoped<TService>(Func<IServiceProvider, TService> implementationFactory) where TService : class
		{
			ExceptionPolyfills.ThrowIfNull(implementationFactory, "implementationFactory");
			return Describe(typeof(TService), implementationFactory, ServiceLifetime.Scoped);
		}

		public static ServiceDescriptor KeyedScoped<TService>(object? serviceKey, Func<IServiceProvider, object?, TService> implementationFactory) where TService : class
		{
			ExceptionPolyfills.ThrowIfNull(implementationFactory, "implementationFactory");
			return DescribeKeyed(typeof(TService), serviceKey, implementationFactory, ServiceLifetime.Scoped);
		}

		public static ServiceDescriptor Scoped(Type service, Func<IServiceProvider, object> implementationFactory)
		{
			ExceptionPolyfills.ThrowIfNull(service, "service");
			ExceptionPolyfills.ThrowIfNull(implementationFactory, "implementationFactory");
			return Describe(service, implementationFactory, ServiceLifetime.Scoped);
		}

		public static ServiceDescriptor KeyedScoped(Type service, object? serviceKey, Func<IServiceProvider, object?, object> implementationFactory)
		{
			ExceptionPolyfills.ThrowIfNull(service, "service");
			ExceptionPolyfills.ThrowIfNull(implementationFactory, "implementationFactory");
			return DescribeKeyed(service, serviceKey, implementationFactory, ServiceLifetime.Scoped);
		}

		public static ServiceDescriptor Singleton<TService, [DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicConstructors)] TImplementation>() where TService : class where TImplementation : class, TService
		{
			return DescribeKeyed<TService, TImplementation>((object)null, ServiceLifetime.Singleton);
		}

		public static ServiceDescriptor KeyedSingleton<TService, [DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicConstructors)] TImplementation>(object? serviceKey) where TService : class where TImplementation : class, TService
		{
			return DescribeKeyed<TService, TImplementation>(serviceKey, ServiceLifetime.Singleton);
		}

		public static ServiceDescriptor Singleton(Type service, [DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicConstructors)] Type implementationType)
		{
			ExceptionPolyfills.ThrowIfNull(service, "service");
			ExceptionPolyfills.ThrowIfNull(implementationType, "implementationType");
			return Describe(service, implementationType, ServiceLifetime.Singleton);
		}

		public static ServiceDescriptor KeyedSingleton(Type service, object? serviceKey, [DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicConstructors)] Type implementationType)
		{
			ExceptionPolyfills.ThrowIfNull(service, "service");
			ExceptionPolyfills.ThrowIfNull(implementationType, "implementationType");
			return DescribeKeyed(service, serviceKey, implementationType, ServiceLifetime.Singleton);
		}

		public static ServiceDescriptor Singleton<TService, TImplementation>(Func<IServiceProvider, TImplementation> implementationFactory) where TService : class where TImplementation : class, TService
		{
			ExceptionPolyfills.ThrowIfNull(implementationFactory, "implementationFactory");
			return Describe(typeof(TService), implementationFactory, ServiceLifetime.Singleton);
		}

		public static ServiceDescriptor KeyedSingleton<TService, TImplementation>(object? serviceKey, Func<IServiceProvider, object?, TImplementation> implementationFactory) where TService : class where TImplementation : class, TService
		{
			ExceptionPolyfills.ThrowIfNull(implementationFactory, "implementationFactory");
			return DescribeKeyed(typeof(TService), serviceKey, implementationFactory, ServiceLifetime.Singleton);
		}

		public static ServiceDescriptor Singleton<TService>(Func<IServiceProvider, TService> implementationFactory) where TService : class
		{
			ExceptionPolyfills.ThrowIfNull(implementationFactory, "implementationFactory");
			return Describe(typeof(TService), implementationFactory, ServiceLifetime.Singleton);
		}

		public static ServiceDescriptor KeyedSingleton<TService>(object? serviceKey, Func<IServiceProvider, object?, TService> implementationFactory) where TService : class
		{
			ExceptionPolyfills.ThrowIfNull(implementationFactory, "implementationFactory");
			return DescribeKeyed(typeof(TService), serviceKey, implementationFactory, ServiceLifetime.Singleton);
		}

		public static ServiceDescriptor Singleton(Type serviceType, Func<IServiceProvider, object> implementationFactory)
		{
			ExceptionPolyfills.ThrowIfNull(serviceType, "serviceType");
			ExceptionPolyfills.ThrowIfNull(implementationFactory, "implementationFactory");
			return Describe(serviceType, implementationFactory, ServiceLifetime.Singleton);
		}

		public static ServiceDescriptor KeyedSingleton(Type serviceType, object? serviceKey, Func<IServiceProvider, object?, object> implementationFactory)
		{
			ExceptionPolyfills.ThrowIfNull(serviceType, "serviceType");
			ExceptionPolyfills.ThrowIfNull(implementationFactory, "implementationFactory");
			return DescribeKeyed(serviceType, serviceKey, implementationFactory, ServiceLifetime.Singleton);
		}

		public static ServiceDescriptor Singleton<TService>(TService implementationInstance) where TService : class
		{
			ExceptionPolyfills.ThrowIfNull(implementationInstance, "implementationInstance");
			return Singleton(typeof(TService), implementationInstance);
		}

		public static ServiceDescriptor KeyedSingleton<TService>(object? serviceKey, TService implementationInstance) where TService : class
		{
			ExceptionPolyfills.ThrowIfNull(implementationInstance, "implementationInstance");
			return KeyedSingleton(typeof(TService), serviceKey, implementationInstance);
		}

		public static ServiceDescriptor Singleton(Type serviceType, object implementationInstance)
		{
			ExceptionPolyfills.ThrowIfNull(serviceType, "serviceType");
			ExceptionPolyfills.ThrowIfNull(implementationInstance, "implementationInstance");
			return new ServiceDescriptor(serviceType, implementationInstance);
		}

		public static ServiceDescriptor KeyedSingleton(Type serviceType, object? serviceKey, object implementationInstance)
		{
			ExceptionPolyfills.ThrowIfNull(serviceType, "serviceType");
			ExceptionPolyfills.ThrowIfNull(implementationInstance, "implementationInstance");
			return new ServiceDescriptor(serviceType, serviceKey, implementationInstance);
		}

		private static ServiceDescriptor DescribeKeyed<TService, [DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicConstructors)] TImplementation>(object serviceKey, ServiceLifetime lifetime) where TService : class where TImplementation : class, TService
		{
			return DescribeKeyed(typeof(TService), serviceKey, typeof(TImplementation), lifetime);
		}

		public static ServiceDescriptor Describe(Type serviceType, [DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicConstructors)] Type implementationType, ServiceLifetime lifetime)
		{
			return new ServiceDescriptor(serviceType, implementationType, lifetime);
		}

		public static ServiceDescriptor DescribeKeyed(Type serviceType, object? serviceKey, [DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicConstructors)] Type implementationType, ServiceLifetime lifetime)
		{
			return new ServiceDescriptor(serviceType, serviceKey, implementationType, lifetime);
		}

		public static ServiceDescriptor Describe(Type serviceType, Func<IServiceProvider, object> implementationFactory, ServiceLifetime lifetime)
		{
			return new ServiceDescriptor(serviceType, implementationFactory, lifetime);
		}

		public static ServiceDescriptor DescribeKeyed(Type serviceType, object? serviceKey, Func<IServiceProvider, object?, object> implementationFactory, ServiceLifetime lifetime)
		{
			return new ServiceDescriptor(serviceType, serviceKey, implementationFactory, lifetime);
		}

		private string DebuggerToString()
		{
			string text = $"Lifetime = {Lifetime}, ServiceType = \"{ServiceType.FullName}\"";
			if (IsKeyedService)
			{
				text += $", ServiceKey = \"{ServiceKey}\"";
				if (KeyedImplementationType != null)
				{
					return text + ", KeyedImplementationType = \"" + KeyedImplementationType.FullName + "\"";
				}
				if (KeyedImplementationFactory != null)
				{
					return text + $", KeyedImplementationFactory = {KeyedImplementationFactory.Method}";
				}
				return text + $", KeyedImplementationInstance = {KeyedImplementationInstance}";
			}
			if (ImplementationType != null)
			{
				return text + ", ImplementationType = \"" + ImplementationType.FullName + "\"";
			}
			if (ImplementationFactory != null)
			{
				return text + $", ImplementationFactory = {ImplementationFactory.Method}";
			}
			return text + $", ImplementationInstance = {ImplementationInstance}";
		}

		private static void ThrowNonKeyedDescriptor()
		{
			throw new InvalidOperationException(System.SR.NonKeyedDescriptorMisuse);
		}
	}
	[AttributeUsage(AttributeTargets.Parameter)]
	public class ServiceKeyAttribute : Attribute
	{
	}
	public enum ServiceKeyLookupMode
	{
		InheritKey,
		NullKey,
		ExplicitKey
	}
	public enum ServiceLifetime
	{
		Singleton,
		Scoped,
		Transient
	}
	public static class ServiceProviderKeyedServiceExtensions
	{
		public static T? GetKeyedService<T>(this IServiceProvider provider, object? serviceKey)
		{
			ExceptionPolyfills.ThrowIfNull(provider, "provider");
			if (provider is IKeyedServiceProvider keyedServiceProvider)
			{
				return (T)keyedServiceProvider.GetKeyedService(typeof(T), serviceKey);
			}
			throw new InvalidOperationException(System.SR.KeyedServicesNotSupported);
		}

		public static object? GetKeyedService(this IServiceProvider provider, Type serviceType, object? serviceKey)
		{
			ExceptionPolyfills.ThrowIfNull(provider, "provider");
			ExceptionPolyfills.ThrowIfNull(serviceType, "serviceType");
			if (provider is IKeyedServiceProvider keyedServiceProvider)
			{
				return keyedServiceProvider.GetKeyedService(serviceType, serviceKey);
			}
			throw new InvalidOperationException(System.SR.KeyedServicesNotSupported);
		}

		public static object GetRequiredKeyedService(this IServiceProvider provider, Type serviceType, object? serviceKey)
		{
			ExceptionPolyfills.ThrowIfNull(provider, "provider");
			ExceptionPolyfills.ThrowIfNull(serviceType, "serviceType");
			if (provider is IKeyedServiceProvider keyedServiceProvider)
			{
				return keyedServiceProvider.GetRequiredKeyedService(serviceType, serviceKey);
			}
			throw new InvalidOperationException(System.SR.KeyedServicesNotSupported);
		}

		public static T GetRequiredKeyedService<T>(this IServiceProvider provider, object? serviceKey) where T : notnull
		{
			ExceptionPolyfills.ThrowIfNull(provider, "provider");
			return (T)provider.GetRequiredKeyedService(typeof(T), serviceKey);
		}

		public static IEnumerable<T> GetKeyedServices<T>(this IServiceProvider provider, object? serviceKey)
		{
			ExceptionPolyfills.ThrowIfNull(provider, "provider");
			return provider.GetRequiredKeyedService<IEnumerable<T>>(serviceKey);
		}

		[RequiresDynamicCode("The native code for an IEnumerable<serviceType> might not be available at runtime.")]
		public static IEnumerable<object?> GetKeyedServices(this IServiceProvider provider, Type serviceType, object? serviceKey)
		{
			ExceptionPolyfills.ThrowIfNull(provider, "provider");
			ExceptionPolyfills.ThrowIfNull(serviceType, "serviceType");
			Type serviceType2 = typeof(IEnumerable<>).MakeGenericType(serviceType);
			return (IEnumerable<object>)provider.GetRequiredKeyedService(serviceType2, serviceKey);
		}
	}
	public static class ServiceProviderServiceExtensions
	{
		public static T? GetService<T>(this IServiceProvider provider)
		{
			ExceptionPolyfills.ThrowIfNull(provider, "provider");
			return (T)provider.GetService(typeof(T));
		}

		public static object GetRequiredService(this IServiceProvider provider, Type serviceType)
		{
			ExceptionPolyfills.ThrowIfNull(provider, "provider");
			ExceptionPolyfills.ThrowIfNull(serviceType, "serviceType");
			if (provider is ISupportRequiredService supportRequiredService)
			{
				return supportRequiredService.GetRequiredService(serviceType);
			}
			return provider.GetService(serviceType) ?? throw new InvalidOperationException(System.SR.Format(System.SR.NoServiceRegistered, serviceType));
		}

		public static T GetRequiredService<T>(this IServiceProvider provider) where T : notnull
		{
			ExceptionPolyfills.ThrowIfNull(provider, "provider");
			return (T)provider.GetRequiredService(typeof(T));
		}

		public static IEnumerable<T> GetServices<T>(this IServiceProvider provider)
		{
			ExceptionPolyfills.ThrowIfNull(provider, "provider");
			return provider.GetRequiredService<IEnumerable<T>>();
		}

		[RequiresDynamicCode("The native code for an IEnumerable<serviceType> might not be available at runtime.")]
		public static IEnumerable<object?> GetServices(this IServiceProvider provider, Type serviceType)
		{
			ExceptionPolyfills.ThrowIfNull(provider, "provider");
			ExceptionPolyfills.ThrowIfNull(serviceType, "serviceType");
			Type serviceType2 = typeof(IEnumerable<>).MakeGenericType(serviceType);
			return (IEnumerable<object>)provider.GetRequiredService(serviceType2);
		}

		public static IServiceScope CreateScope(this IServiceProvider provider)
		{
			return provider.GetRequiredService<IServiceScopeFactory>().CreateScope();
		}

		public static AsyncServiceScope CreateAsyncScope(this IServiceProvider provider)
		{
			return new AsyncServiceScope(provider.CreateScope());
		}

		public static AsyncServiceScope CreateAsyncScope(this IServiceScopeFactory serviceScopeFactory)
		{
			return new AsyncServiceScope(serviceScopeFactory.CreateScope());
		}
	}
}
namespace Microsoft.Extensions.DependencyInjection.Extensions
{
	public static class ServiceCollectionDescriptorExtensions
	{
		public static IServiceCollection Add(this IServiceCollection collection, ServiceDescriptor descriptor)
		{
			ExceptionPolyfills.ThrowIfNull(collection, "collection");
			ExceptionPolyfills.ThrowIfNull(descriptor, "descriptor");
			collection.Add(descriptor);
			return collection;
		}

		public static IServiceCollection Add(this IServiceCollection collection, IEnumerable<ServiceDescriptor> descriptors)
		{
			ExceptionPolyfills.ThrowIfNull(collection, "collection");
			ExceptionPolyfills.ThrowIfNull(descriptors, "descriptors");
			foreach (ServiceDescriptor descriptor in descriptors)
			{
				collection.Add(descriptor);
			}
			return collection;
		}

		public static void TryAdd(this IServiceCollection collection, ServiceDescriptor descriptor)
		{
			ExceptionPolyfills.ThrowIfNull(collection, "collection");
			ExceptionPolyfills.ThrowIfNull(descriptor, "descriptor");
			int count = collection.Count;
			for (int i = 0; i < count; i++)
			{
				if (collection[i].ServiceType == descriptor.ServiceType && object.Equals(collection[i].ServiceKey, descriptor.ServiceKey))
				{
					return;
				}
			}
			collection.Add(descriptor);
		}

		public static void TryAdd(this IServiceCollection collection, IEnumerable<ServiceDescriptor> descriptors)
		{
			ExceptionPolyfills.ThrowIfNull(collection, "collection");
			ExceptionPolyfills.ThrowIfNull(descriptors, "descriptors");
			foreach (ServiceDescriptor descriptor in descriptors)
			{
				collection.TryAdd(descriptor);
			}
		}

		public static void TryAddTransient(this IServiceCollection collection, [DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicConstructors)] Type service)
		{
			ExceptionPolyfills.ThrowIfNull(collection, "collection");
			ExceptionPolyfills.ThrowIfNull(service, "service");
			ServiceDescriptor descriptor = ServiceDescriptor.Transient(service, service);
			collection.TryAdd(descriptor);
		}

		public static void TryAddTransient(this IServiceCollection collection, Type service, [DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicConstructors)] Type implementationType)
		{
			ExceptionPolyfills.ThrowIfNull(collection, "collection");
			ExceptionPolyfills.ThrowIfNull(service, "service");
			ExceptionPolyfills.ThrowIfNull(implementationType, "implementationType");
			ServiceDescriptor descriptor = ServiceDescriptor.Transient(service, implementationType);
			collection.TryAdd(descriptor);
		}

		public static void TryAddTransient(this IServiceCollection collection, Type service, Func<IServiceProvider, object> implementationFactory)
		{
			ExceptionPolyfills.ThrowIfNull(collection, "collection");
			ExceptionPolyfills.ThrowIfNull(service, "service");
			ExceptionPolyfills.ThrowIfNull(implementationFactory, "implementationFactory");
			ServiceDescriptor descriptor = ServiceDescriptor.Transient(service, implementationFactory);
			collection.TryAdd(descriptor);
		}

		public static void TryAddTransient<[DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicConstructors)] TService>(this IServiceCollection collection) where TService : class
		{
			ExceptionPolyfills.ThrowIfNull(collection, "collection");
			collection.TryAddTransient(typeof(TService), typeof(TService));
		}

		public static void TryAddTransient<TService, [DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicConstructors)] TImplementation>(this IServiceCollection collection) where TService : class where TImplementation : class, TService
		{
			ExceptionPolyfills.ThrowIfNull(collection, "collection");
			collection.TryAddTransient(typeof(TService), typeof(TImplementation));
		}

		public static void TryAddTransient<TService>(this IServiceCollection services, Func<IServiceProvider, TService> implementationFactory) where TService : class
		{
			services.TryAdd(ServiceDescriptor.Transient(implementationFactory));
		}

		public static void TryAddScoped(this IServiceCollection collection, [DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicConstructors)] Type service)
		{
			ExceptionPolyfills.ThrowIfNull(collection, "collection");
			ExceptionPolyfills.ThrowIfNull(service, "service");
			ServiceDescriptor descriptor = ServiceDescriptor.Scoped(service, service);
			collection.TryAdd(descriptor);
		}

		public static void TryAddScoped(this IServiceCollection collection, Type service, [DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicConstructors)] Type implementationType)
		{
			ExceptionPolyfills.ThrowIfNull(collection, "collection");
			ExceptionPolyfills.ThrowIfNull(service, "service");
			ExceptionPolyfills.ThrowIfNull(implementationType, "implementationType");
			ServiceDescriptor descriptor = ServiceDescriptor.Scoped(service, implementationType);
			collection.TryAdd(descriptor);
		}

		public static void TryAddScoped(this IServiceCollection collection, Type service, Func<IServiceProvider, object> implementationFactory)
		{
			ExceptionPolyfills.ThrowIfNull(collection, "collection");
			ExceptionPolyfills.ThrowIfNull(service, "service");
			ExceptionPolyfills.ThrowIfNull(implementationFactory, "implementationFactory");
			ServiceDescriptor descriptor = ServiceDescriptor.Scoped(service, implementationFactory);
			collection.TryAdd(descriptor);
		}

		public static void TryAddScoped<[DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicConstructors)] TService>(this IServiceCollection collection) where TService : class
		{
			ExceptionPolyfills.ThrowIfNull(collection, "collection");
			collection.TryAddScoped(typeof(TService), typeof(TService));
		}

		public static void TryAddScoped<TService, [DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicConstructors)] TImplementation>(this IServiceCollection collection) where TService : class where TImplementation : class, TService
		{
			ExceptionPolyfills.ThrowIfNull(collection, "collection");
			collection.TryAddScoped(typeof(TService), typeof(TImplementation));
		}

		public static void TryAddScoped<TService>(this IServiceCollection services, Func<IServiceProvider, TService> implementationFactory) where TService : class
		{
			services.TryAdd(ServiceDescriptor.Scoped(implementationFactory));
		}

		public static void TryAddSingleton(this IServiceCollection collection, [DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicConstructors)] Type service)
		{
			ExceptionPolyfills.ThrowIfNull(collection, "collection");
			ExceptionPolyfills.ThrowIfNull(service, "service");
			ServiceDescriptor descriptor = ServiceDescriptor.Singleton(service, service);
			collection.TryAdd(descriptor);
		}

		public static void TryAddSingleton(this IServiceCollection collection, Type service, [DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicConstructors)] Type implementationType)
		{
			ExceptionPolyfills.ThrowIfNull(collection, "collection");
			ExceptionPolyfills.ThrowIfNull(service, "service");
			ExceptionPolyfills.ThrowIfNull(implementationType, "implementationType");
			ServiceDescriptor descriptor = ServiceDescriptor.Singleton(service, implementationType);
			collection.TryAdd(descriptor);
		}

		public static void TryAddSingleton(this IServiceCollection collection, Type service, Func<IServiceProvider, object> implementationFactory)
		{
			ExceptionPolyfills.ThrowIfNull(collection, "collection");
			ExceptionPolyfills.ThrowIfNull(service, "service");
			ExceptionPolyfills.ThrowIfNull(implementationFactory, "implementationFactory");
			ServiceDescriptor descriptor = ServiceDescriptor.Singleton(service, implementationFactory);
			collection.TryAdd(descriptor);
		}

		public static void TryAddSingleton<[DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicConstructors)] TService>(this IServiceCollection collection) where TService : class
		{
			ExceptionPolyfills.ThrowIfNull(collection, "collection");
			collection.TryAddSingleton(typeof(TService), typeof(TService));
		}

		public static void TryAddSingleton<TService, [DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicConstructors)] TImplementation>(this IServiceCollection collection) where TService : class where TImplementation : class, TService
		{
			ExceptionPolyfills.ThrowIfNull(collection, "collection");
			collection.TryAddSingleton(typeof(TService), typeof(TImplementation));
		}

		public static void TryAddSingleton<TService>(this IServiceCollection collection, TService instance) where TService : class
		{
			ExceptionPolyfills.ThrowIfNull(collection, "collection");
			ExceptionPolyfills.ThrowIfNull(instance, "instance");
			ServiceDescriptor descriptor = ServiceDescriptor.Singleton(typeof(TService), instance);
			collection.TryAdd(descriptor);
		}

		public static void TryAddSingleton<TService>(this IServiceCollection services, Func<IServiceProvider, TService> implementationFactory) where TService : class
		{
			services.TryAdd(ServiceDescriptor.Singleton(implementationFactory));
		}

		public static void TryAddEnumerable(this IServiceCollection services, ServiceDescriptor descriptor)
		{
			ExceptionPolyfills.ThrowIfNull(services, "services");
			ExceptionPolyfills.ThrowIfNull(descriptor, "descriptor");
			Type implementationType = descriptor.GetImplementationType();
			if (implementationType == typeof(object) || implementationType == descriptor.ServiceType)
			{
				throw new ArgumentException(System.SR.Format(System.SR.TryAddIndistinguishableTypeToEnumerable, implementationType, descriptor.ServiceType), "descriptor");
			}
			int count = services.Count;
			for (int i = 0; i < count; i++)
			{
				ServiceDescriptor serviceDescriptor = services[i];
				if (serviceDescriptor.ServiceType == descriptor.ServiceType && serviceDescriptor.GetImplementationType() == implementationType && object.Equals(serviceDescriptor.ServiceKey, descriptor.ServiceKey))
				{
					return;
				}
			}
			services.Add(descriptor);
		}

		public static void TryAddEnumerable(this IServiceCollection services, IEnumerable<ServiceDescriptor> descriptors)
		{
			ExceptionPolyfills.ThrowIfNull(services, "services");
			ExceptionPolyfills.ThrowIfNull(descriptors, "descriptors");
			foreach (ServiceDescriptor descriptor in descriptors)
			{
				services.TryAddEnumerable(descriptor);
			}
		}

		public static IServiceCollection Replace(this IServiceCollection collection, ServiceDescriptor descriptor)
		{
			ExceptionPolyfills.ThrowIfNull(collection, "collection");
			ExceptionPolyfills.ThrowIfNull(descriptor, "descriptor");
			int count = collection.Count;
			for (int i = 0; i < count; i++)
			{
				if (collection[i].ServiceType == descriptor.ServiceType && object.Equals(collection[i].ServiceKey, descriptor.ServiceKey))
				{
					collection.RemoveAt(i);
					break;
				}
			}
			collection.Add(descriptor);
			return collection;
		}

		public static IServiceCollection RemoveAll<T>(this IServiceCollection collection)
		{
			return collection.RemoveAll(typeof(T));
		}

		public static IServiceCollection RemoveAll(this IServiceCollection collection, Type serviceType)
		{
			ExceptionPolyfills.ThrowIfNull(serviceType, "serviceType");
			for (int num = collection.Count - 1; num >= 0; num--)
			{
				ServiceDescriptor serviceDescriptor = collection[num];
				if (serviceDescriptor.ServiceType == serviceType && serviceDescriptor.ServiceKey == null)
				{
					collection.RemoveAt(num);
				}
			}
			return collection;
		}

		public static void TryAddKeyedTransient(this IServiceCollection collection, [DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicConstructors)] Type service, object? serviceKey)
		{
			ExceptionPolyfills.ThrowIfNull(collection, "collection");
			ExceptionPolyfills.ThrowIfNull(service, "service");
			ServiceDescriptor descriptor = ServiceDescriptor.KeyedTransient(service, serviceKey, service);
			collection.TryAdd(descriptor);
		}

		public static void TryAddKeyedTransient(this IServiceCollection collection, Type service, object? serviceKey, [DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicConstructors)] Type implementationType)
		{
			ExceptionPolyfills.ThrowIfNull(collection, "collection");
			ExceptionPolyfills.ThrowIfNull(service, "service");
			ExceptionPolyfills.ThrowIfNull(implementationType, "implementationType");
			ServiceDescriptor descriptor = ServiceDescriptor.KeyedTransient(service, serviceKey, implementationType);
			collection.TryAdd(descriptor);
		}

		public static void TryAddKeyedTransient(this IServiceCollection collection, Type service, object? serviceKey, Func<IServiceProvider, object?, object> implementationFactory)
		{
			ExceptionPolyfills.ThrowIfNull(collection, "collection");
			ExceptionPolyfills.ThrowIfNull(service, "service");
			ExceptionPolyfills.ThrowIfNull(implementationFactory, "implementationFactory");
			ServiceDescriptor descriptor = ServiceDescriptor.KeyedTransient(service, serviceKey, implementationFactory);
			collection.TryAdd(descriptor);
		}

		public static void TryAddKeyedTransient<[DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicConstructors)] TService>(this IServiceCollection collection, object? serviceKey) where TService : class
		{
			ExceptionPolyfills.ThrowIfNull(collection, "collection");
			collection.TryAddKeyedTransient(typeof(TService), serviceKey, typeof(TService));
		}

		public static void TryAddKeyedTransient<TService, [DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicConstructors)] TImplementation>(this IServiceCollection collection, object? serviceKey) where TService : class where TImplementation : class, TService
		{
			ExceptionPolyfills.ThrowIfNull(collection, "collection");
			collection.TryAddKeyedTransient(typeof(TService), serviceKey, typeof(TImplementation));
		}

		public static void TryAddKeyedTransient<TService>(this IServiceCollection services, object? serviceKey, Func<IServiceProvider, object?, TService> implementationFactory) where TService : class
		{
			services.TryAdd(ServiceDescriptor.KeyedTransient(serviceKey, implementationFactory));
		}

		public static void TryAddKeyedScoped(this IServiceCollection collection, [DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicConstructors)] Type service, object? serviceKey)
		{
			ExceptionPolyfills.ThrowIfNull(collection, "collection");
			ExceptionPolyfills.ThrowIfNull(service, "service");
			ServiceDescriptor descriptor = ServiceDescriptor.KeyedScoped(service, serviceKey, service);
			collection.TryAdd(descriptor);
		}

		public static void TryAddKeyedScoped(this IServiceCollection collection, Type service, object? serviceKey, [DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicConstructors)] Type implementationType)
		{
			ExceptionPolyfills.ThrowIfNull(collection, "collection");
			ExceptionPolyfills.ThrowIfNull(service, "service");
			ExceptionPolyfills.ThrowIfNull(implementationType, "implementationType");
			ServiceDescriptor descriptor = ServiceDescriptor.KeyedScoped(service, serviceKey, implementationType);
			collection.TryAdd(descriptor);
		}

		public static void TryAddKeyedScoped(this IServiceCollection collection, Type service, object? serviceKey, Func<IServiceProvider, object?, object> implementationFactory)
		{
			ExceptionPolyfills.ThrowIfNull(collection, "collection");
			ExceptionPolyfills.ThrowIfNull(service, "service");
			ExceptionPolyfills.ThrowIfNull(implementationFactory, "implementationFactory");
			ServiceDescriptor descriptor = ServiceDescriptor.KeyedScoped(service, serviceKey, implementationFactory);
			collection.TryAdd(descriptor);
		}

		public static void TryAddKeyedScoped<[DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicConstructors)] TService>(this IServiceCollection collection, object? serviceKey) where TService : class
		{
			ExceptionPolyfills.ThrowIfNull(collection, "collection");
			collection.TryAddKeyedScoped(typeof(TService), serviceKey, typeof(TService));
		}

		public static void TryAddKeyedScoped<TService, [DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicConstructors)] TImplementation>(this IServiceCollection collection, object? serviceKey) where TService : class where TImplementation : class, TService
		{
			ExceptionPolyfills.ThrowIfNull(collection, "collection");
			collection.TryAddKeyedScoped(typeof(TService), serviceKey, typeof(TImplementation));
		}

		public static void TryAddKeyedScoped<TService>(this IServiceCollection services, object? serviceKey, Func<IServiceProvider, object?, TService> implementationFactory) where TService : class
		{
			services.TryAdd(ServiceDescriptor.KeyedScoped(serviceKey, implementationFactory));
		}

		public static void TryAddKeyedSingleton(this IServiceCollection collection, [DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicConstructors)] Type service, object? serviceKey)
		{
			ExceptionPolyfills.ThrowIfNull(collection, "collection");
			ExceptionPolyfills.ThrowIfNull(service, "service");
			ServiceDescriptor descriptor = ServiceDescriptor.KeyedSingleton(service, serviceKey, service);
			collection.TryAdd(descriptor);
		}

		public static void TryAddKeyedSingleton(this IServiceCollection collection, Type service, object? serviceKey, [DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicConstructors)] Type implementationType)
		{
			ExceptionPolyfills.ThrowIfNull(collection, "collection");
			ExceptionPolyfills.ThrowIfNull(service, "service");
			ExceptionPolyfills.ThrowIfNull(implementationType, "implementationType");
			ServiceDescriptor descriptor = ServiceDescriptor.KeyedSingleton(service, serviceKey, implementationType);
			collection.TryAdd(descriptor);
		}

		public static void TryAddKeyedSingleton(this IServiceCollection collection, Type service, object? serviceKey, Func<IServiceProvider, object?, object> implementationFactory)
		{
			ExceptionPolyfills.ThrowIfNull(collection, "collection");
			ExceptionPolyfills.ThrowIfNull(service, "service");
			ExceptionPolyfills.ThrowIfNull(implementationFactory, "implementationFactory");
			ServiceDescriptor descriptor = ServiceDescriptor.KeyedSingleton(service, serviceKey, implementationFactory);
			collection.TryAdd(descriptor);
		}

		public static void TryAddKeyedSingleton<[DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicConstructors)] TService>(this IServiceCollection collection, object? serviceKey) where TService : class
		{
			ExceptionPolyfills.ThrowIfNull(collection, "collection");
			collection.TryAddKeyedSingleton(typeof(TService), serviceKey, typeof(TService));
		}

		public static void TryAddKeyedSingleton<TService, [DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicConstructors)] TImplementation>(this IServiceCollection collection, object? serviceKey) where TService : class where TImplementation : class, TService
		{
			ExceptionPolyfills.ThrowIfNull(collection, "collection");
			collection.TryAddKeyedSingleton(typeof(TService), serviceKey, typeof(TImplementation));
		}

		public static void TryAddKeyedSingleton<TService>(this IServiceCollection collection, object? serviceKey, TService instance) where TService : class
		{
			ExceptionPolyfills.ThrowIfNull(collection, "collection");
			ExceptionPolyfills.ThrowIfNull(instance, "instance");
			ServiceDescriptor descriptor = ServiceDescriptor.KeyedSingleton(typeof(TService), serviceKey, instance);
			collection.TryAdd(descriptor);
		}

		public static void TryAddKeyedSingleton<TService>(this IServiceCollection services, object? serviceKey, Func<IServiceProvider, object?, TService> implementationFactory) where TService : class
		{
			services.TryAdd(ServiceDescriptor.KeyedSingleton(serviceKey, implementationFactory));
		}

		public static IServiceCollection RemoveAllKeyed<T>(this IServiceCollection collection, object? serviceKey)
		{
			return collection.RemoveAllKeyed(typeof(T), serviceKey);
		}

		public static IServiceCollection RemoveAllKeyed(this IServiceCollection collection, Type serviceType, object? serviceKey)
		{
			ExceptionPolyfills.ThrowIfNull(serviceType, "serviceType");
			for (int num = collection.Count - 1; num >= 0; num--)
			{
				ServiceDescriptor serviceDescriptor = collection[num];
				if (serviceDescriptor.ServiceType == serviceType && object.Equals(serviceDescriptor.ServiceKey, serviceKey))
				{
					collection.RemoveAt(num);
				}
			}
			return collection;
		}
	}
}