I see the majority of WPF Ribbon examples out there use some code like
xmlns:r=\"clr-namespace:Microsoft.Windows.Controls.Ribbon;assembly=RibbonControlsLibrary\
If you are using the new Microsoft WPF Ribbon, the RibbonCommand type has been removed. The Command property is now an ICommand type.
To set the command on a RibbonButton, you can do the following:
or use any command that implements ICommand.