title: Using LINQ to convert a list to a CSV string
body: <p>I have a list of integers and I want to be able to convert this to a string where each number is separated by a comma.</p>
  
  <p>So far example if my list was:</p>
  
  <pre><code>1
  2
  3
  4
  5
  </code></pre>
  
  <p>My expected output would be: </p>
  
  <pre><code>1, 2, 3, 4, 5
  </code></pre>
  
  <p>Is this possible using LINQ?</p>
  
  <p>Thanks</p>