title: Checking for nulls in an integer data type
body: <p>I have a line that is giving an error:<br>
  <strong>Type of conditional expression cannot be determined because there is no implicit conversion between 'string' and 'int'</strong></p>
  
  <pre><code>param[0].Value = form_request_id == null ? DBNull.Value.ToString() : form_request_id; 
  </code></pre>
  
  <p>however, form_request_id is an int  </p>
  
  <p>How do I check for nulls in an int data type?</p>