Incorporated style feedback

src/VisualStudio/Core/Def/SolutionEventMonitor.cs

@@ -54,26 +54,28 @@ private void SolutionOpeningContextChanged(object sender, UIContextChangedEventA
 
         private void ContextChangedWorker(UIContextChangedEventArgs e, string operation)
         {
-            if (_notificationService != null)
+            if (_notificationService == null)
+            {
+                return;
+            }
+
+            TryCancelPendingNotification(operation);
+
+            if (e.Activated)
             {
-                TryCancelPendingNotification(operation);
-                
-                if (e.Activated)
-                {
-                    _operations[operation] = _notificationService.Start(operation);
-                }
+                _operations[operation] = _notificationService.Start(operation);
             }
         }
 
         private void TryCancelPendingNotification(string operation)
         {
-            if (_operations.ContainsKey(operation))
+            GlobalOperationRegistration globalOperation;
+            if (_operations.TryGetValue(operation, out globalOperation))
             {
-                var globalOperation = _operations[operation];
                 globalOperation.Done();
                 globalOperation.Dispose();
             }
         }
-       
+
     }
 }