title: how to define events in mvvm model in Silverlight
body: <p>i have an combox  control defined  with events in my mainpage.xaml</p>
  
  <pre><code>  &lt;Grid x:Name="LayoutRoot"&gt;
  &lt;ComboBox SelectionChanged="ComboBox_SelectionChanged"&gt;&lt;/ComboBox&gt;
    &lt;/Grid&gt;
  
  private void ComboBox_SelectionChanged(object sender, SelectionChangedEventArgs e)
          {
  
          }
  </code></pre>
  
  <p>now how  do we  defined  events for combox  control in mvvm model . </p>
  
  <p>and  how do we  bind the collection list  to  combo box. i am using SL 3</p>
  
  <p>thanks</p>
  
  <p>prince</p>