title: How ValidatesOnExceptions works
body: <p>based on this example</p>
  
  <p><a href="http://msdn.microsoft.com/en-us/library/system.windows.data.binding.validatesonexceptions.aspx" rel="noreferrer">http://msdn.microsoft.com/en-us/library/system.windows.data.binding.validatesonexceptions.aspx</a></p>
  
  <p>It seems that ValidatesOnExceptions is responsable to catch the custom exception and add it to Validation.Errors collection.</p>
  
  <p>The problem is <strong>I have the same behavior even with ValidatesOnExceptions set to false</strong> </p>
  
  <p>Could someone explain what I am missing?</p>
  
  <p>Thanks</p>