title: Change the border color of Winforms menu dropdown list
body: <p>Is it possible to change the border color of a toolstrip menu dropdown list.</p>
  
  <p>In my sample below I would like the dropdown menu to have 1 color (blue) without the white border currently being displated, but keeping the main menu ('My Menu') item white.</p>
  
  <p>Any ideas?</p>
  
  <p><a href="https://i.stack.imgur.com/Lbtfn.png" rel="noreferrer"><img src="https://i.stack.imgur.com/Lbtfn.png" alt="enter image description here"></a></p>