Menu with radio-button like grouping

Question

Hi there,

I'm working on a WPF App using Blend3/VS2008.  I'm trying to make a menu where only one of the items can be checked, similar to a radio button set.

There doesn't appear to be a "GroupName" property that I can set on each MenuItem to designate it as part of a group, like I would do with radio buttons.

I found the post below, but it seems to only work with toolbar items, not regular menu items.

http://social.msdn.microsoft.com/Forums/en-US/winforms/thread/722b1df9-ecb5-4906-b13c-1925bf165037

This seems like a common UI function, am I just missing something obvious?  Do I have write a bunch of custom event handlers to do this?

Thanks!