As suggested here, the EventToCommand
class sits in the Extras
dll, so I would try the following xmlns:
xmlns:mvvmgalasoftCommand="clr-namespace:GalaSoft.MvvmLight.Command;assembly=GalaSoft.MvvmLight.Extras.WPF4"
Note that I've added the Extras
in the assembly name. not sure if you need the WPF4
suffix, you can try it with/without it and see if it works