Problem: "Mapping URI" errors with WPF Assembly Names that include spaces
This is a somewhat insidious bug. As it turns out, if you have spaces in your WPF project’s assembly name, you can get “Mapping URI” errors in your project’s XAML (even if the solution itself builds properly). As you might imagine, you can get around this bug by changing the namespace. For example: Change this: OakLeaf MM WPF To: OakLeaf.MM.WPF Kevin McNeishMicrosoft .NET MVPINETA SpeakerChief Architect, MM .NET Application Frameworkhttp://www.oakleafsd.com