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WPF+ VS2010: Design mode error "The URI prefix is not recognized"?

Posted By:      Posted Date: August 27, 2010    Points: 0   Category :WPF
our application uses VS2008 and WPF. To apply the styles in the design mode, we have used the "BlendMergedDictionary" class (see the following link) http://stackoverflow.com/questions/995101/how-do-i-get-wysiwyg-design-in-blend-vs-without-merged-resourcedictionary-in-ever It works very well in VS2008 IDE. Now we plan to move our application to VS2010. In VS2010 Design mode (click on ~.xaml design), we get error message:  "The URI prefix is not recognized."    at System.Net.WebRequest.Create(Uri requestUri, Boolean userUriBase)    at System.Net.WebRequest.Create(Uri requestUri)    at MS.Internal.WpfWebRequestHelper.CreateRequest(Uri uri)    at System.Windows.ResourceDictionary.set_Source(Uri value) the styles does not apply at the design time. It works fine in runtime. The following are the code: public class BlendMergedDictionary : ResourceDictionary { /// <summary> /// This class the purpose is allow we reference the "themes" and "styles" in resource dictionaries in separated assemblies /// by using StaticResource. The big problem using StaticResource is that it will complaints at design time can not find the resources /// So we use this class in xaml file, if it is design time, it will load the resource dictionaries in. /// If it is not in design time, it will use the reso

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