title: Drag and drop files into my listbox
body: <p>i try to add the option to my application to drag file into my <code>Listbox</code> instead of navigate into the file folder and this is what i have try:</p>
  
  <pre><code>private void Form1_Load(object sender, EventArgs e)
  {
      listBoxFiles.AllowDrop = true;
      listBoxFiles.DragDrop += listBoxFiles_DragDrop;
      listBoxFiles.DragEnter += listBoxFiles_DragEnter;
  }
  
  private void listBoxFiles_DragEnter(object sender, DragEventArgs e)
  {
      e.Effect = DragDropEffects.Copy;
  }
  
  private void listBoxFiles_DragDrop(object sender, DragEventArgs e)
  {
      listBoxFiles.Items.Add(e.Data.ToString());
  }
  </code></pre>
  
  <p>but instead of the full file path <code>e.Data.ToString()</code> <code>return System.Windows.Forms.DataObject</code></p>