title: How to write the following group by  and stripping time Linq query?
body: <p>I have list like this- </p>
  
  <pre><code>Id    Date
  1     01/03/2011 14:15:23.320
  1     01/03/2011 16:15:23.320
  1     01/03/2011 18:15:23.320
  1     01/04/2011 19:15:23.320
  2     01/03/2011 14:15:23.320
  2     01/03/2011 15:15:23.320
  2     01/03/2011 18:15:23.320
  2     01/05/2011 19:15:23.320
  2     01/07/2011 20:15:23.320 
  </code></pre>
  
  <p>My desired output is -</p>
  
  <pre><code>Id    Date
  1     01/03/2011
  1     01/04/2011 
  2     01/03/2011 
  2     01/05/2011 
  2     01/07/2011
  </code></pre>
  
  <p>So how can I group by on the first list on id and take only the date part and achieve the results above in Linq ?</p>