<PackageReference Include="Microsoft.Extensions.Configuration" Version="11.0.0-preview.1.26104.118" />

ExtensionMarkerAttribute

using Microsoft.CodeAnalysis; namespace System.Runtime.CompilerServices { [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 { private readonly string <Name>k__BackingField; public string Name => <Name>k__BackingField; public ExtensionMarkerAttribute(string name) { <Name>k__BackingField = name; } } }