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Author: CyrusNajmabadi

src/LanguageServer/Protocol/Handler/Extensions/ExtensionMessageResponse.cs

@@ -9,7 +9,9 @@ namespace Microsoft.CodeAnalysis.LanguageServer.Handler.Extensions;
 /// <summary>
 /// Return type for the roslyn/extensionWorkspaceMessage and roslyn/extensionDocumentMessage request.
 /// </summary>
-/// <param name="Response">Json response returned by the extension message handler.</param>
+/// <param name="Response">Json response returned by the extension message handler. Can be <see langword="null"/> if the
+/// extension was unloaded concurrently with the response being issued, or if the extension threw an exception while
+/// processing.</param>
 internal readonly record struct ExtensionMessageResponse(
     [property: JsonPropertyName("response"), JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)] string? Response,
     [property: JsonPropertyName("extensionWasUnloaded"), JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingDefault)] bool ExtensionWasUnloaded,