Jennifer
I found my mistake. I didn't uninstall previous Toolkit version manually. I can compile my solution correctly after uninstall.
As I understood from help's "What's new..." and after compile XAML source (menu and etc) didn't localize and I need do it myself. Is it true?
PS
I translate menu in FeatureDataGrid To Russian and compile Toolkit. Is it possible to use local. Toolkit in Arc SL Viewer beta 2 ?
Thanks
Oleg