additional changes for disposable

Author: TylerLeonhardt

src/JsonRpc/InputHandler.cs

@@ -236,9 +236,9 @@ private void HandleRequest(string request)
 
         public void Dispose()
         {
+            _scheduler.Dispose();
             _outputHandler.Dispose();
             _inputThread = null;
-            _scheduler.Dispose();
             _input?.Dispose();
         }
     }

src/JsonRpc/OutputHandler.cs

@@ -71,12 +71,12 @@ private void ProcessOutputQueue()
             catch (OperationCanceledException ex)
             {
                 if (ex.CancellationToken != token)
-                    _outputIsFinished.SetException(ex);
+                    _outputIsFinished.TrySetException(ex);
                 // else ignore. Exceptions: OperationCanceledException - The CancellationToken has been canceled.
             }
             catch (Exception e)
             {
-                _outputIsFinished.SetException(e);
+                _outputIsFinished.TrySetException(e);
             }
         }