title: c# Working with Strings
body: <p>I'm Learning c# and i am making some exercises. i was asked to make a program that make an array of strings and remove the vowels form it's words
  i did this code to remove the vowel "S" but it didn't work. can someone help me with that ?</p>
  
  <pre><code>string[] musicinst = new string[4] { "cello", "guitar", "violin", "double bass" };
  
  foreach (string s in musicinst)
  {
      if (s.Contains("s")) { s.Replace("s", ""); }
      Console.WriteLine(s);                                       
  }
  </code></pre>
  
  <p>now this code outputs the words exactly as i typed them in the array with no changes. so what is the problem here ?</p>