title: cannot convert from 'System.Collections.Generic.IEnumerable<char>' to 'string'
body: <p>I try to Reverse my string but I get to following error</p>
  
  <pre><code>string str = word.Reverse();
  </code></pre>
  
  <p>error: </p>
  
  <blockquote>
    <p>cannot convert from 'System.Collections.Generic.IEnumerable' to
    'string'</p>
  </blockquote>
  
  <p>anyone know what should I need to do ?</p>