Hi
Are you testing with a Composite WPF application? I have no problem with the Datagrid in any normal WPF application, it works as expected.
With the Composite application, the shell has the LicenseKey defined and the application runs perfectly.
The modules however have no knowledge of the shell and therefore will not know the LicenseKey at design time. So in Blend I get A LicenseException.
Having
Kr George