title: IsNullOrEmpty with Object
body: <p>IsNullOrEmpty is used with strings to check if a string is null or empty.
  Is there an equivalent with an object to see if any object is null or not?
  I assume we can do </p>
  
  <pre><code>    obj1 != null 
  </code></pre>
  
  <p>but not sure if there is any other way...</p>