Error in Silverlight Application

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I have an error while creating new silver-light application.

That error is

System.NullReferenceException
Object reference not set to an instance of an object.

at Microsoft.Windows.Design.Platform.SilverlightMetadataContext.SilverlightXamlExtensionImplementations.<getxmlnamespacecompatibilitymappings>d__8.MoveNext()
at MS.Internal.Design.Metadata.ReflectionProjectNode.BuildSubsumption()
at MS.Internal.Design.Metadata.ReflectionProjectNode.SubsumingNamespace(Identifier identifier)
at MS.Internal.Design.Markup.XmlElement.BuildScope(PrefixScope parentScope, IParseContext context)
at MS.Internal.Design.Markup.XmlElement.ConvertToXaml(XamlElement parent, PrefixScope parentScope, IParseContext context, IMarkupSourceProvider provider)
at MS.Internal.Design.DocumentModel.DocumentTrees.Markup.XamlSourceDocument.FullParse(Boolean convertToXamlWithErrors)
at MS.Internal.Design.DocumentModel.DocumentTrees.Markup.XamlSourceDocument.get_RootItem()
at Microsoft.Windows.Design.DocumentModel.Trees.ModifiableDocumentTree.get_ModifiableRootItem()
at Microsoft.Windows.Design.DocumentModel.MarkupDocumentManagerBase.get_LoadState()
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()

Posted 10-Jun-12 20:49pm

Sakthivel Parasuraman

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2 solutions

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Abhinav S · Answer 1 · 2012-06-10T20:53:00

Solution 1

Based on your erro description, the datacontext is null.
You get an error when you try to access the next element in the context.

Debugging your application might help you get a solution to the error.

Posted 10-Jun-12 20:53pm

Abhinav S

Updated 10-Jun-12 20:54pm

v2

Comments

Sandeep Mewara 11-Jun-12 5:25am

Comment from OP:
But Im not getting the designer page. How i design...

Rahul.KumarSharma · Answer 2 · 2012-06-10T21:32:00

Solution 3

Debug your visual studio and see where the problem is.

For more info see :

http://msdn.microsoft.com/en-us/library/ff356886(v=vs.95).aspx[^]
http://forums.silverlight.net/t/177630.aspx/1[^]

Posted 10-Jun-12 21:32pm

Rahul.KumarSharma

Updated 10-Jun-12 21:33pm

v2