title: How to Join two ObservableCollection into one ObservableCollection by using LINQ join Query in silverlight
body: <p>I have two ObservableCollection named Customer and Group in Silverlight MVVM project that using Entity Framework.</p>
  
  <p>I need to join this two ObservableCollection and need to yield a new ObservableCollection named Final. Joining is made up of using Conditions.</p>
  
  <p>1st ObservableCollection had the following fields </p>
  
  <pre><code>cid, groupid uname
  1    2       Raj
  2    3       Jeya
  </code></pre>
  
  <p>2nd ObservableCollection had the following fields </p>
  
  <pre><code>groupid groupname
  2     Traveler
  3     Shopper
  </code></pre>
  
  <p>and my final table looks like the following</p>
  
  <pre><code>uname groupname
  Raj    Traveler
  Jeya    Shopper
  </code></pre>
  
  <p>Is there anyway to get it the final result..?</p>