Windows Phone 7 Designer view error in Visual Studio 2010 Ultimate [closed]?

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I got struck with this designer error, can some one help me on this. I was using Visual Studio express for windows phone, after I installed Visual Studio 2010 Ultimate I get this error. Attached screen shot for reference.

Note - When executing the application still we get the output in the Win Phone 7 Emulator. Error: An Unhandled Exception has occured Click here to reload the designer Details: System. ArgumentNullException Value cannot be null.

Parameter name: parentContext at Microsoft.Windows.Design.Metadata. ReflectionMetadataContext..ctor(IMetadataContext parentContext) at MS.Internal.Host. ProjectMetadataContext..ctor(IMetadataContext platformMetadata, AssemblyReferenceProvider referenceProvider) at MS.Internal.Host.

ProjectMetadataContext. FromReferences(AssemblyReferenceProvider referenceProvider) at MS.Internal.Designer.VSDesigner. GetMetadataForDesignerContext(DesignerContext designerContext) at MS.Internal.Host.

PersistenceSubsystem.Load() at MS.Internal.Host.Designer.Load() at MS.Internal.Designer.VSDesigner.Load() at MS.Internal.Designer. VSIsolatedDesigner.VSIsolatedView.Load() at MS.Internal.Designer. VSIsolatedDesigner.

VSIsolatedDesignerFactory. Load(IsolatedView view) at MS.Internal.Host.Isolation. IsolatedDesigner.BootstrapProxy.

LoadDesigner(IsolatedDesignerFactory factory, IsolatedView view) at MS.Internal.Host.Isolation. IsolatedDesigner.BootstrapProxy. LoadDesigner(IsolatedDesignerFactory factory, IsolatedView view) at MS.Internal.Host.Isolation.

IsolatedDesigner.Load() at MS.Internal.Designer.DesignerPane. LoadDesignerView() windows-phone-7 link|improve this question asked Dec 8 '11 at 6:29Karthikeyan Anbarasan262.

I think it needs to be 1-VS, 2-SP1, 3-Phone tools. – Filip Skakun Dec 8 '11 at 6:35 I encountered the same problem. Hope this helps: stackoverflow.com/questions/8517975/… – Raj Sekharan Dec 15 '11 at 10:45.

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