Ensure that the hub client proxy generator correctly processes both explicit and inferred generic type arguments

src/SignalR/clients/csharp/Client.SourceGenerator/src/HubClientProxyGenerator.Parser.cs

@@ -134,13 +134,7 @@ private static bool IsExtensionClassSignatureValid(ClassDeclarationSyntax syntax
             return true;
         }
 
-        internal static bool IsSyntaxTargetForGeneration(SyntaxNode node) => node is MemberAccessExpressionSyntax
-        {
-            Name: GenericNameSyntax
-            {
-                Arity: 1
-            }
-        };
+        internal static bool IsSyntaxTargetForGeneration(SyntaxNode node) => node is MemberAccessExpressionSyntax{ Name: SimpleNameSyntax };
 
         internal static MemberAccessExpressionSyntax? GetSemanticTargetForGeneration(GeneratorSyntaxContext context)
         {
@@ -251,10 +245,11 @@ internal SourceGenerationSpec Parse(ImmutableArray<MethodDeclarationSyntax> meth
                     var argModel = _compilation.GetSemanticModel(argType.SyntaxTree);
                     symbol = (ITypeSymbol)argModel.GetSymbolInfo(argType).Symbol;
                 }
-                else if (memberAccess.Name is not GenericNameSyntax
-                         && memberAccess.Parent.ChildNodes().FirstOrDefault(x => x is ArgumentListSyntax) is
-                             ArgumentListSyntax
-                         { Arguments: { Count: 1 } } als)
+                else if (memberAccess.Name is SimpleNameSyntax
+                        && memberAccess.Parent.ChildNodes().FirstOrDefault(x => x is ArgumentListSyntax) is
+                            ArgumentListSyntax
+                        { Arguments: { Count: 1 } } als)
+
                 {
                     // Method isn't using generic syntax so inspect first expression in arguments to deduce the type
                     var argModel = _compilation.GetSemanticModel(als.Arguments[0].Expression.SyntaxTree);