title: Linq query to get count
body: <pre><code>id | IsEnquiry  | 
  =================
  1      true
  2      false
  3      false
  4      true
  </code></pre>
  
  <p>How can I get the count of id where IsEnquiry=true by using a Linq Query</p>
  
  <p>Pls Help me to write the query.</p>
  
  <p>Thanks,
  Bharath</p>