I don't recall the specific details right now, but the problem you're hitting sounds very much like what I discuss in my blog post:
If you plan to recompile the WPF Toolkit from source, please be aware that two of the three Charting
design-time assemblies reference Blend 3 DLLs
Microsoft.Windows.Design.Interaction.dll. Unlike their Visual Studio counterparts, these design-time assemblies are
not automatically found by the build and their absence causes 84 build errors in the
Controls.DataVisualization.Toolkit.Expression.Design projects. :(
Most people won't care about building the Blend-specific design-time assemblies and can simply right-click the two failing projects in Visual Studio and choose "Unload Project". After that, everything builds successfully.
Alternatively, users with Blend installed can update these projects' references to both assemblies and then everything (including the Blend design-time assemblies!) builds successfully. The default location of the Blend assemblies is something like
C:\Program Files (x86)\Microsoft Expression\Blend 3 Beta. (If you're on a 32-bit OS, remove the "
x86"; once Blend releases, remove the "
Sorry for the inconvenience - we didn't want to ship pre-release Blend components with the WPF Toolkit.