title: Merge toolstrip MDI child - parent
body: <p>I found some informations on the internet but nothing helped me out.
  How can I merge a toolstrip in the parent mdi form?</p>
  
  <p>Edit:</p>
  
  <p>It worked for me with this code:</p>
  
  <pre><code>private void MainForm_MdiChildActivate(object sender, EventArgs e)
  {
      IChildWindow child = ActiveMdiChild as IChildWindow;
  
      if (child != null)
      {
          ToolStripManager.Merge(child.ToolStrip, toolStrip1);
          child.ToolStrip.Hide();
  
          child.FormClosing += delegate(object sender2, FormClosingEventArgs fe)
          {
              child.ToolStrip.Show();
              ToolStripManager.RevertMerge(toolStrip1, child.ToolStrip);
          };
      }
  }
  </code></pre>