title: C# - short check for null
body: <p>How do I replace the following code</p>
  
  <pre><code>if (customer.Person!=null)
   Console.WriteLine(customer.Person.Name);
  </code></pre>
  
  <p>with something like this</p>
  
  <pre><code>Console.WriteLine(customer.Person.Name?? "unknown");
  </code></pre>