title: Compare two comma separated string and find the missing values
body: <p>Which is the best way I can compare two C# string variables containing comma separated values and find the difference?</p>
  
  <p>The scenario is like.</p>
  
  <pre><code>string variable1 = "AAA, BBB, CCC, DDD";
  string variable2 = "AAA, CCC, DDD, EEE";
  </code></pre>
  
  <p>And I need the result like "BBB" (the value which is present in variable2 but not in variable1.</p>
  
  <p>Thanks</p>