Object reference not set to an instance of an object. at MS.Internal.Package.VSIsolationProviderService.CreateIsolationProvider(String identity, AssemblyReferenceProvider assemblyReferences, IEnumerable`1 assemblyFolders) at MS.Internal.Providers.VSDesignerContext.GetIsolationProvider(IServiceProvider provider, IVsHierarchy hierarchy, AssemblyReferenceProvider assemblyReferences) at MS.Internal.Providers.VSDesignerContext.Initialize(IServiceProvider provider, IVsHierarchy hierarchy, UInt32 itemid, Object docDataObj) at MS.Internal.Providers.VSDesignerContext..ctor(IServiceProvider provider, IVsWindowFrame frame, Object docDataObj) at MS.Internal.Providers.VSDesignerContext.GetContext(IServiceProvider services, IVsWindowFrame frame, Boolean createIfNotExist) at MS.Internal.Designer.DesignerPane.InitializeDesigner()
It displays the above instead of displaying the WPF designer. Also, I cannot Debug>Start Debugging the application anymore. I can still run/test/build it in Expression studio though...
The funny thing is that if I restart a project in Expression blend, copy all the xaml codes, and copy all the vb .net codes from the original application, it works for some time, and then afterwards start giving me the same error at wpf designer in VS2008.
I've googled the first line of the error. I've had HEAPS of hits. But I have not been able to find any proper solution. Each of the persons getting this prob seemed to have different issues.
Can any1 please help?
P.S: I've been working on a client/server application. Now BOTH my client and my server are giving me the same message
This post has been edited by Ameel: 31 March 2009 - 11:17 AM