title: Is there a simple way to implement a Checked Combobox in WinForms
body: <p>Does anyone know of a simple implementation of a checked combobox in WinForms? I haven't been able to find anything when googling.</p>
  
  <p>I want something that behaves like this windows scheduled task trigger edit:</p>
  
  <p><img src="https://i.stack.imgur.com/7txf5.png" alt="enter image description here"></p>