I am using .Net Framework 4 client profile. I created a brand new wpf project for test. I put the toolkit dll locally as is the test project. It worked. I can be able to reference it in xaml.
In my original wpf project i put the toolkit dll on shared network and referenced it from there. I think that is the reason why i was unable to see the namespace in xaml. I typed it manually.
Still i can't see the properties for the masked text box when i reference toolkit from shared network place. The designer shows you error but everything builds and run successfully. What is the explanation for this.