title: How to get distinct values separately in string array?
body: <p>i have two string array </p>
  
  <pre><code>string[] oldname = ["arun","jack","tom"];
  string[] newname = ["jack","hardy","arun"];
  </code></pre>
  
  <p>here i want compare these two string arrays to get these distinct values separately like :</p>
  
  <pre><code>oldname = ["tom"];
  newname = ["hardy"];
  </code></pre>
  
  <p>how to achieve these ...</p>