title: How to Pass a value from One User Control to another in WPF.
body: <p>I am developing the GUI of my Project as a UserControl in WPF. And I'm trying to use it in another WPF Window. It works fine but the real problem is passing a particular value from one user control to another. </p>
  
  <pre><code>eg: 
  UserControl1 is displayed within WPFWindow1 
  UserControl2 is displayed within WPFWindow2 
  
  MainWindow opens Window1 , Window1 opens Window 2 . 
  </code></pre>
  
  <p>So the requirement is that in Window2 , when the User clicked the button it should pass a value to Window1 . </p>
  
  <p>Here is a sample Project I did to make it understand better (Just in Case) :<a href="http://goo.gl/h0zpL7" rel="nofollow">http://goo.gl/h0zpL7</a></p>