title: Group By Query with Entity Framework
body: <p>In my application I have <strong>Movements</strong> associated with a <strong>category</strong>. 
  I want a list of the most frequent <strong>category</strong>. </p>
  
  <p>My objects are: </p>
  
  <p><strong>Category</strong>: <strong>catId</strong>, catName 
  <br><strong>Movement</strong>: Movid, movDate, movMount, <strong>catId</strong> </p>
  
  <p>I think it would have to raise it with a "Group By" query (grouping by catId and getting those more)
  (Im using Entity Framework 6 in c#)</p>
  
  <p>From already thank you very much!</p>