Add ExperimentalAttribute

src/Consume/Consume.cs

@@ -132,6 +132,15 @@ void KeyValuePairDeconstruct(IEnumerable<KeyValuePair<string, string>> variables
 
 #endif
 
+    #pragma warning disable ExperimentalMethod
+    static void ExperimentalMethodUsage() =>
+        ExperimentalMethod();
+
+    [Experimental("ExperimentalMethod")]
+    static void ExperimentalMethod()
+    {
+    }
+
     async Task CancellationTokenSource()
     {
         var source = new CancellationTokenSource();

src/Directory.Build.props

@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <Project>
   <PropertyGroup>
-    <Version>1.31.0</Version>
+    <Version>1.32.0</Version>
     <AssemblyVersion>1.0.0</AssemblyVersion>
     <PackageTags>Polyfill</PackageTags>
     <DisableImplicitNamespaceImports>true</DisableImplicitNamespaceImports>

src/Polyfill/ExperimentalAttribute.cs

@@ -0,0 +1,72 @@
+// <auto-generated />
+
+#nullable enable
+
+#if !NET8_0_OR_GREATER
+
+using System.Diagnostics;
+using System.Diagnostics.CodeAnalysis;
+using Link = System.ComponentModel.DescriptionAttribute;
+
+namespace System.Diagnostics.CodeAnalysis;
+
+/// <summary>
+/// Indicates that a parameter captures the expression passed for another parameter as a string.
+/// </summary>
+/// <summary>
+///  Indicates that an API is experimental and it may change in the future.
+/// </summary>
+/// <remarks>
+///   This attribute allows call sites to be flagged with a diagnostic that indicates that an experimental
+///   feature is used. Authors can use this attribute to ship preview features in their assemblies.
+/// </remarks>
+[AttributeUsage(AttributeTargets.Assembly |
+                AttributeTargets.Module |
+                AttributeTargets.Class |
+                AttributeTargets.Struct |
+                AttributeTargets.Enum |
+                AttributeTargets.Constructor |
+                AttributeTargets.Method |
+                AttributeTargets.Property |
+                AttributeTargets.Field |
+                AttributeTargets.Event |
+                AttributeTargets.Interface |
+                AttributeTargets.Delegate, Inherited = false)]
+[ExcludeFromCodeCoverage]
+[DebuggerNonUserCode]
+[Link("https://learn.microsoft.com/en-us/dotnet/api/system.diagnostics.codeanalysis.experimentalattribute?view=net-8.0")]
+#if PolyPublic
+public
+#endif
+sealed class ExperimentalAttribute : Attribute
+{
+    /// <summary>
+    ///  Initializes a new instance of the <see cref="ExperimentalAttribute"/> class, specifying the ID that the compiler will use
+    ///  when reporting a use of the API the attribute applies to.
+    /// </summary>
+    /// <param name="diagnosticId">The ID that the compiler will use when reporting a use of the API the attribute applies to.</param>
+    public ExperimentalAttribute(string diagnosticId)
+    {
+        DiagnosticId = diagnosticId;
+    }
+
+    /// <summary>
+    ///  Gets the ID that the compiler will use when reporting a use of the API the attribute applies to.
+    /// </summary>
+    /// <value>The unique diagnostic ID.</value>
+    /// <remarks>
+    ///  The diagnostic ID is shown in build output for warnings and errors.
+    ///  <para>This property represents the unique ID that can be used to suppress the warnings or errors, if needed.</para>
+    /// </remarks>
+    public string DiagnosticId { get; }
+
+    /// <summary>
+    ///  Gets or sets the URL for corresponding documentation.
+    ///  The API accepts a format string instead of an actual URL, creating a generic URL that includes the diagnostic ID.
+    /// </summary>
+    /// <value>The format string that represents a URL to corresponding documentation.</value>
+    /// <remarks>An example format string is <c>https://contoso.com/obsoletion-warnings/{0}</c>.</remarks>
+    public string? UrlFormat { get; set; }
+}
+
+#endif