title: What does an Empty IQueryable return as when Empty?
body: <p>I am in need of determining whether an IQueryable Method returns with Data, or "Empty" when applying it to a DataSource of a RadGrid like so:</p>
  
  <pre><code>RadGrid.DataSource = Method(x);
  
          if (Method(x) == yyy)
          {
              button.Enabled = true;
          }
          else
          {
              button.Enabled = false;
          }
  </code></pre>
  
  <p>I have tried using "null" in place of the "yyy" but with no success. When stepping through the code, the IQueryable Method returns as "Empty" but I am unsure of how to verify that using an If statement.</p>
  
  <p>What does an IQueryable Method return as if it returns as Empty, and how can I verify that using an If Statement?</p>