C# How to place a comma after each word but the last in the list
<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>
