Fix wrap with tag under cohosting (#12049)

Author: davidwengier

src/Razor/src/Microsoft.VisualStudio.LanguageServices.Razor/LanguageClient/WrapWithTag/VSInternalWrapWithTagParams.cs

@@ -11,7 +11,7 @@ namespace Microsoft.VisualStudio.Razor.LanguageClient.WrapWithTag;
 /// Matches corresponding class in Web Tools' Html language server
 /// </summary>
 [DataContract]
-internal class VSInternalWrapWithTagParams
+internal class VSInternalWrapWithTagParams : ITextDocumentParams
 {
     public VSInternalWrapWithTagParams(LspRange range,
                                        string tagName,
@@ -24,6 +24,8 @@ public VSInternalWrapWithTagParams(LspRange range,
         TextDocument = textDocument;
     }
 
+    TextDocumentIdentifier ITextDocumentParams.TextDocument => TextDocument;
+
     /// <summary>
     /// Gets or sets the identifier for the text document to be operate on.
     /// </summary>