title: Preventing selection of the same value in seperate comboboxes on a C# form
body: <p>I'm building a form application in c#. I have between 6-12 different comboboxes (varying depending on other options specific to this program, but that's beside the point), each with the same 6 selections.</p>
  
  <p>What would be the easiest way to prevent a user from selecting the same item in more than a single combobox?</p>