title: What is the use of ConvertBack method in IValueConverter interface?
body: <p>What is the use of <code>ConvertBack</code> method in the <code>IValueConverter</code> interface.</p>
  
  <p><strong>When will it be called?</strong></p>
  
  <p>Or what is the <strong>order of invocation</strong> of the <code>Convert</code> and <code>ConvertBack</code> methods?</p>
  
  <p><strong>I have asked the question here because:</strong> I have bound <strong>one property of codebehind</strong> to TEXTBOX’s TEXT Property and am using <code>convertor</code> for that property.  The first <code>Convert</code> Method invokes and when I change <code>TEXT</code> in <code>TEXTBOX</code> nothing happens... but as soon as I close the form the <code>ConvertBack</code> method invokes.</p>