title: Replace a item in string array
body: <p>I have a string array and want to replace a value from that array.</p>
  
  <p>Example: </p>
  
  <pre><code>string[] stud = new[] {"1","12","Mark","M"};
  string[] otherStud = new [] {"2","16","MarkMark","F"};
  </code></pre>
  
  <p>I want to replace the <code>Mark</code> with <code>Tom</code>, then Result should be </p>
  
  <p>Result: </p>
  
  <pre><code>string[] stud = new [] {"1","12","Tom","M"};
  string[] otherStud = new [] {"2","16","TomTom","F"};
  </code></pre>
  
  <p>please suggest any solutions.</p>
  
  <p>Thanks</p>