title: Selected Item of Visuual Collection is not set in LightSwitch while changing the selection in Screen
body: <p>I created a lightswitch control extension for Silverlight control that bounds to a collection.
  (like DataGrid)</p>
  
  <p>It correctly shows data on a screen, but the underlying query's SelectedItem property is not getting updated when I select a row in the grid. When I use a LS DataGrid it works as expected.</p>
  
  <p>What am guessing is, i need to bind the selected item of table and My Collection Control.</p>
  
  <p>How can i do this in my extension itself??</p>
  
  <p>Thanks..</p>