Loading XAML from external locationhttp://developers.de/blogs/damir_dobric/archive/2013/01/29/loading-xaml-from-external-location.aspxWhen working with XAML in general, like with Workflow or even WPF you might get following error: Cannot create unknown type '{clr-namespace:YOURNAMESPACE}YOURCONTROL'.' Line number '' and line position ''. This error will occurredenCommunityServer 2008 SP1 (Build: 30619.63)