System.NullReferenceException error in my silver light application

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when i try to create silver light application this error appear to me . i use visual studio 2010

System.NullReferenceException<br />
Object reference not set to an instance of an object.<br />
   at Microsoft.Windows.Design.Platform.SilverlightMetadataContext.SilverlightXamlExtensionImplementations.<getxmlnamespacecompatibilitymappings>d__8.MoveNext()<br />
   at MS.Internal.Design.Metadata.ReflectionProjectNode.BuildSubsumption()<br />
   at MS.Internal.Design.Metadata.ReflectionProjectNode.SubsumingNamespace(Identifier identifier)<br />
   at MS.Internal.Design.Markup.XmlElement.BuildScope(PrefixScope parentScope, IParseContext context)<br />
   at MS.Internal.Design.Markup.XmlElement.ConvertToXaml(XamlElement parent, PrefixScope parentScope, IParseContext context, IMarkupSourceProvider provider)<br />
   at MS.Internal.Design.DocumentModel.DocumentTrees.Markup.XamlSourceDocument.FullParse(Boolean convertToXamlWithErrors)<br />
   at MS.Internal.Design.DocumentModel.DocumentTrees.Markup.XamlSourceDocument.get_RootItem()<br />
   at Microsoft.Windows.Design.DocumentModel.Trees.ModifiableDocumentTree.get_ModifiableRootItem()<br />
   at Microsoft.Windows.Design.DocumentModel.MarkupDocumentManagerBase.get_LoadState()<br />
   at MS.Internal.Host.PersistenceSubsystem.Load()<br />
   at MS.Internal.Host.Designer.Load()<br />
   at MS.Internal.Designer.VSDesigner.Load()<br />
   at MS.Internal.Designer.VSIsolatedDesigner.VSIsolatedView.Load()<br />
   at MS.Internal.Designer.VSIsolatedDesigner.VSIsolatedDesignerFactory.Load(IsolatedView view)<br />
   at MS.Internal.Host.Isolation.IsolatedDesigner.BootstrapProxy.LoadDesigner(IsolatedDesignerFactory factory, IsolatedView view)<br />
   at MS.Internal.Host.Isolation.IsolatedDesigner.BootstrapProxy.LoadDesigner(IsolatedDesignerFactory factory, IsolatedView view)<br />
   at MS.Internal.Host.Isolation.IsolatedDesigner.Load()<br />
   at MS.Internal.Designer.DesignerPane.LoadDesignerView()</getxmlnamespacecompatibilitymappings>

Posted 22-Mar-12 2:13am

Member 8699156

Updated 22-Mar-12 7:00am

Uday P.Singh

v2

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The14thNoah 15-May-14 4:54am

I also encountered this error after I installed VS2012 in my pc. . can anybody tell/give suggest on how to fixed this error?
thanks in advance :)

3 solutions

Solution 3

when i try to create silver light application this error errorSystem.NullReferenceException appear to me . i use visual studio 2010

Posted 21-Oct-12 21:23pm

mostafa_mmh

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Uday P.Singh · Accepted Answer · 2012-03-22T07:04:00

Solution 2

You need to reinstall Silverlight. First remove and the install this[^]

hope it helps :)

Posted 22-Mar-12 7:04am

Uday P.Singh

Comments

Member 8699156 23-Mar-12 5:25am

thanks soooooooooooooooooooooo much

Uday P.Singh 23-Mar-12 11:15am

welcome! you can accept the answer if it helped you.

Rahul Rajat Singh · Accepted Answer · 2012-03-22T02:21:00

Solution 1

Too little info but let me try to think:

Looks like you are calling MoveNext() without checking for range. the movenext when called on limiting value will result in NullReferenceException as there is nothing left to move to.

check for boundary values and it should go away.

Posted 22-Mar-12 2:21am

Rahul Rajat Singh

Comments

Member 8699156 22-Mar-12 9:07am

thanks but i did not write any code it is appear just when i create new project
in the mainpage in the design mode