title: Is there a BeforeUpdate for a C# ComboBox on a Winform
body: <p>I come from the VBA world, and remember there was a <code>BeforeUpdate</code> call I could make on a combobox. Now I am in C# (and loving it) and I was wondering is there a <code>BeforeUpdate</code> call for a <code>ComboBox</code> on a Winform?</p>
  
  <p>I can make an invisible textbox and store the info I need there and after the update, look at that box for what I need, but I was hoping there was a simplier solution.</p>