title: Drag and drop in read only rich text box
body: <p>I am trying implement drag and drop feature in RichTextBox (windows common control). It works fine using the code shown below. However, the drag drop event is not getting triggered when I set the ReadOnly property to true. Is there anything that I am missing? or is that the right behaviour ? Please advice.   </p>
  
  <pre><code>private void rtb_dragdrop(object sender, DragEventArgs e)
  {
      Console.WriteLine("Test");       
  }
  
  private void rtb_dragenter(object sender, DragEventArgs e)
  {
      e.Effect = DragDropEffects.Copy;
  }
  </code></pre>