title: C# How to place a comma after each word but the last in the list
body: <p>I totally new to C# and learning as I go.  I am stuck on issue which I'm hoping an experienced programmer can help.  I have added a CheckedListBox to my form and added a collection of 6 items to it.  I need all but the last item selected to have a comma placed beside it, so my question is: how can I tell C# NOT to place a comma beside the last item selected?</p>
  
  <pre><code>foreach (object itemChecked in RolesCheckedListBox.CheckedItems)
  {
      sw.Write(itemChecked.ToString() + ",");
  }
  </code></pre>
  
  <p>Thanks for any help received!
  Dan</p>