本文介绍了System.ArgumentNullException是如何进行的？的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我在Phone 7上使用visual studio express为WP启动了一个新项目，但在第一次开始时收到了一组错误信息，我什么都没改变！
I started a new project on Phone 7 using visual studio express for WP, but got a set of error message at the very first beginning, and I changed nothing!
有什么问题？我正在使用.net3.5。并且w7x86
what's the problem? I am using .net3.5 something. And w7x86
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()
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