Is this a bug or am I missing something?

SizeToContent

I've got a regular WPF window and grid to autozize as the contents of a label changes. It works perfectly.

Changing it to a RibbonWindow makes it look great, but the autoresizing stops working.

All I'm changing is the window type. All other code remains identical.

I'd like to use RibbonWindow, but short of writing rafts of code to manually calculate the element sizes and force the size of the Ribbon Window, I can't see a way to do it.

By the way, this is a popup window to replace MessageBox (to get that nice look) so text etc. is not predictable at design time.

Any ideas?

You can't size a ribbon window automatically to its content; it's just not supported.

Unfortunately there's no way of styling the MessageBox dialogs shown from WPF.

Thanks, Tim.

It's no problem. Still a fantastic product.

(I skinned a standard WPF window instead.)

Cheers.