Better debug message for DeferredInvokeProxy

UIX/Microsoft/Iris/DeferredInvokeProxy.cs

@@ -10,13 +10,17 @@ namespace Microsoft.Iris
 {
     internal class DeferredInvokeProxy
     {
-        private DeferredInvokeHandler _method;
+        private readonly DeferredInvokeHandler _method;
 
-        public static DeferredHandler Thunk(DeferredInvokeHandler method) => new DeferredHandler(new DeferredInvokeProxy()
+        private DeferredInvokeProxy(DeferredInvokeHandler method)
         {
-            _method = method
-        }.Thunk);
+            _method = method;
+        }
+
+        public static DeferredHandler Thunk(DeferredInvokeHandler method) => new DeferredInvokeProxy(method).Thunk;
 
         private void Thunk(object args) => _method(args);
+
+        public override string ToString() => $"{_method.Method.DeclaringType?.FullName}.{_method.Method.Name}";
     }
 }

UIX/Microsoft/Iris/Queues/Dispatcher.cs

@@ -73,13 +73,18 @@ namespace Microsoft.Iris.Queues
                     QueueItem nextItem = queue.GetNextItem();
                     if (nextItem != null)
                     {
-                        Application.Debugger?.LogDispatcher(nextItem.ToDebugPacketString());
+                        var debugString = nextItem.ToDebugPacketString();
+                        Application.Debugger?.LogDispatcher(debugString);
+                        Trace.WriteLine(TraceCategory.Queues, 0, "Dispatcher nextItem := {0}", debugString);
+                        
                         nextItem.Dispatch();
                     }
                     else
+                    {
                         break;
                     }
                 }
+            }
             finally
             {
                 LeaveDispatch();

UIX/Microsoft/Iris/Session/DeferredCall.cs

@@ -158,14 +158,16 @@ namespace Microsoft.Iris.Session
 
         public override string ToDebugPacketString()
         {
-            string packetString = _target?.Target == null
+            if (_target.Target is DeferredInvokeProxy deferredInvokeProxy)
+                return $"{deferredInvokeProxy}({_param})";
+            
+            var packetString = _target?.Target == null
                 ? string.Empty
                 : $"{_target.Target}.";
 
             packetString += _target switch
             {
                 SimpleCallback simpleCallback => simpleCallback.Method.Name,
-                DeferredHandler deferredHandler => $"{deferredHandler.Method.Name}({_param})",
                 EventHandler eventHandler => $"{eventHandler.Method.Name}({_param}, {_args})",
                 _ when _param is IDeferredInvokeItem deferredInvokeItem => deferredInvokeItem.ToString(),