title: mvvm light -Sending Notification message with callback
body: <p>I need the result of FolderBrowserDialog in my view-model,</p>
  
  <p>CodeBehind.cs</p>
  
  <pre><code> private static void SelectFolderDialog()
      {
          using (System.Windows.Forms.FolderBrowserDialog folderdialg = new System.Windows.Forms.FolderBrowserDialog())
          {
              folderdialg.ShowNewFolderButton = false;
              folderdialg.RootFolder = Environment.SpecialFolder.MyComputer;
  
              folderdialg.Description = "Load Images for the Game";
              folderdialg.ShowDialog();
              if (folderdialg.SelectedPath != null)
              {
                  var notifypath = new GenericMessage&lt;string&gt;(folderdialg.SelectedPath);
                  Messenger.Default.Send(notifypath);
  
              }
          }
  </code></pre>
  
  <p>What i'm planning  is , From View-model send a notification with callback to view , executing the FolderBrowserDialog return the Selected path back to the view model.</p>
  
  <p>How do i send notificationmessage with callback / NotificationWithAction using MVVM-Light . please help me with a sample as I'm new to Wpf and MVVM-Light.</p>
  
  <p>Any Help is appreciated</p>