title: Electron.NET: How to add menu?
body: <p>For example: the default menu is
  File, Edit, View, Window, Help</p>
  
  <p>I’d like to add my menu item + subitems
  File, Edit, View, Tools (Options, Customize), Window, Help</p>
  
  <p>How to do it?
  When I do as in example:</p>
  
  <pre><code>var menu = new MenuItem[]
  {
  new MenuItem
  {
  Label = “Tools”,
  Click = async () =&gt;
  {
  await Electron.Dialog.ShowMessageBoxAsync(“Hello, Tools!”);
  }
  }
  };
  Electron.Menu.SetApplicationMenu(menu);
  </code></pre>
  
  <p>It replaces existing menu with my menu Tools, but I need to add it to the existing.</p>