title: Notifiying the user a method did not suceed?
body: <p>I have a method, which returns void. It sets some values in an array, depending on an if/else statement. </p>
  
  <p>However, if the code enters the else statement, this operation cannot be performed. What could I return to the calling method (a method in the code-behind of a winforms form), to indicate this operation did not suceed?</p>
  
  <p>Thanks</p>