title: How to remove Resize indicator (gray line in right bottom corner) from form?
body: <p>Game window is declared with this code:</p>
  
  <pre><code>Form gameWindow;
  ...
  
  gameWindow = new Form();
  gameWindow.ShowDialog(); 
  </code></pre>
  
  <p>How to remove resize indicator? I don't want to disable resizing, just to remove this gray icon</p>
  
  <p><a href="https://i.stack.imgur.com/Aue73.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/Aue73.png" alt="enter image description here"></a></p>