I've downloaded <<Lab: What’s Coming in WPF: Datagrid, Ribbon, and VSM>>from
and place RibbonControlsLibrary.dll to
d:\Sample\WPFFeaturesPreviewHOLOnline\WPF Features Preview HOL Online - Source\source\exercise2\task2\CheckbookManager\
build is ok, and running is ok and nice.
but in *design mode* of MainWindow.xaml, the designer can't display anything and reported an error:
Error 1 Value 'me:AppCommands.AddNew' cannot be assigned to property 'Command'. 'CommandValueSerializer' ValueSerializer cannot convert from 'System.String'. D:\Sample\WPFFeaturesPreviewHOLOnline\WPF
Features Preview HOL Online - Source\source\exercise2\final\CheckbookManager\MainWindow.xaml 14 25 CheckbookManager
What could me do?