title: Check an integer value is Null in c#
body: <p>I have got an integer value and i need to check if it is NULL or not. I got it using a null-coalescing operator</p>
  
  <p>C#:</p>
  
  <pre><code>public int? Age;
  
  if ((Age ?? 0)==0)
  {
     // do somethig
  }
  </code></pre>
  
  <p>Now i have to check in a older application where the declaration part is not in ternary. So, how to achieve this without the null-coalescing operator.</p>