title: LINQ: How do I concatenate a list of integers into comma delimited string?
body: <p>It's probably something silly I missed, but I try to concatenate a list of integers instead of summing them with:</p>
  
  <pre><code>integerArray.Aggregate((accumulator, piece) =&gt; accumulator+"," + piece)
  </code></pre>
  
  <p>The compiler complained about argument error. Is there a slick way to do this without having to go through a loop?</p>