title: Difference between two strings C#
body: <p>Lets say I have two strings:</p>
  
  <pre><code>string s1 = "hello";
  string s2 = "hello world";
  </code></pre>
  
  <p>Is there a way I can get a <code>string s3 = " world";</code> which is the difference between the 2 strings?</p>
  
  <p><strong>EDIT:</strong></p>
  
  <p>The difference will be always in this scenario</p>
  
  <pre><code>s1 = "abc"
  s2 = "abcd ads as "
  </code></pre>