c# - Windows Phone XAML設計器錯誤

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System.NullReferenceException對象引用未設置為對象的實例。 在Microsoft.Expression.DesignHost.Isolation.Remoting.STAMarshaler.MarshalOutSynchronous（動作，Int32目標公寓ID，WaitHandal中止）），位於Microsoft.Expression.DesignHost.Isolation.Remoting.ThreadMarshaler.MarshalOut [TValue]（RemoteHandle，Action）。 1 targetObject, Action action, CallSynchronizationMode syncMode) at Microsoft.Expression.DesignHost.Isolation.Remoting.ThreadMarshaler.MarshalOut[TResult,TValue](RemoteHandle 1 1 targetObject, Action action, CallSynchronizationMode syncMode) at Microsoft.Expression.DesignHost.Isolation.Remoting.ThreadMarshaler.MarshalOut[TResult,TValue](RemoteHandle 1 1 targetObject, Action action, CallSynchronizationMode syncMode) at Microsoft.Expression.DesignHost.Isolation.Remoting.ThreadMarshaler.MarshalOut[TResult,TValue](RemoteHandle targetObject，Func 2 func, CallSynchronizationMode syncMode) at Microsoft.Expression.DesignHost.Isolation.Remoting.LocalDesignerService.CreateDesignerImpl(IHostSourceItem item, IHostTextEditor editor, RemoteCancellationToken remoteCancelToken) at Microsoft.Expression.DesignHost.Isolation.Remoting.LocalDesignerService.<>c__DisplayClass12.<Microsoft.Expression.DesignHost.IDesignerService.CreateDesigner>b__11(RemoteCancellationToken remoteToken) at Microsoft.Expression.DesignHost.Isolation.Remoting.LocalDesignerService.CallWithCancellation[TResult](CancellationToken cancelToken, Func 2 func, CallSynchronizationMode syncMode) at Microsoft.Expression.DesignHost.Isolation.Remoting.LocalDesignerService.CreateDesignerImpl(IHostSourceItem item, IHostTextEditor editor, RemoteCancellationToken remoteCancelToken) at Microsoft.Expression.DesignHost.Isolation.Remoting.LocalDesignerService.<>c__DisplayClass12.<Microsoft.Expression.DesignHost.IDesignerService.CreateDesigner>b__11(RemoteCancellationToken remoteToken) at Microsoft.Expression.DesignHost.Isolation.Remoting.LocalDesignerService.CallWithCancellation[TResult](CancellationToken cancelToken, Func Microsoft.Expression.DesignHost.Isolation.Remoting.LocalDesignerService.Microsoft.Expression.DesignHost.IDesignerService.CreateDesigner（IHostSourceItem項目，IHostTextEditor編輯器，CancelationToken cancelToken）處的2 func, CallSynchronizationMode syncMode) at Microsoft.Expression.DesignHost.Isolation.Remoting.LocalDesignerService.CreateDesignerImpl(IHostSourceItem item, IHostTextEditor editor, RemoteCancellationToken remoteCancelToken) at Microsoft.Expression.DesignHost.Isolation.Remoting.LocalDesignerService.<>c__DisplayClass12.<Microsoft.Expression.DesignHost.IDesignerService.CreateDesigner>b__11(RemoteCancellationToken remoteToken) at Microsoft.Expression.DesignHost.Isolation.Remoting.LocalDesignerService.CallWithCancellation[TResult](CancellationToken cancelToken, Func 2 func） .DesignHost.IsolatedDesignerService.IsolatedDesignerView.CreateDesignerViewInfo（CancellationToken cancelToken）System.NullReferenceException對象引用未設置為對象的實例。服務器堆棧跟蹤：在Microsoft.Expression.DesignHost.Isolation.Remoting.STAMarshaler.MarshalIn（操作動作，在Int32 targetApartmentId）處的Microsoft.Expression.DesignHost.Isolation.Remoting.STAMarshaler.WaitForCompletion（NestedCallContext nestedCallContext，BlockingCall調用，WaitHandle timeoutSignal） Microsoft.Expression.Design.Microsoft.Expression.DesignHost.Isolation.Remoting.ThreadMarshaler.MarshalIn [IRemoteObject targetObject，Action action）在Microsoft.Expression處的Microsoft.Expression.DesignHost.Isolation.Remoting.ThreadMarshaler.MarshalIn [TResult]（IRemoteObject targetObject，Func 1 func) at Microsoft.Expression.DesignHost.Isolation.Remoting.RemoteDesignerService.Microsoft.Expression.DesignHost.Isolation.Remoting.IRemoteDesignerService.CreateDesigner(IRemoteHostSourceItem remoteItem, IRemoteHostTextEditor remoteEditor, IRemoteCancellationToken remoteToken) at System.Runtime.Remoting.Messaging.StackBuilderSink._PrivateProcessMessage(IntPtr md, Object[] args, Object server, Object[]& outArgs) at System.Runtime.Remoting.Messaging.StackBuilderSink.SyncProcessMessage(IMessage msg) Exception rethrown at [0]: at System.Runtime.Remoting.Proxies.RealProxy.HandleReturnMessage(IMessage reqMsg, IMessage retMsg) at System.Runtime.Remoting.Proxies.RealProxy.PrivateInvoke(MessageData& msgData, Int32 type) at Microsoft.Expression.DesignHost.Isolation.Remoting.IRemoteDesignerService.CreateDesigner(IRemoteHostSourceItem remoteItem, IRemoteHostTextEditor remoteEditor, IRemoteCancellationToken cancelToken) at Microsoft.Expression.DesignHost.Isolation.Remoting.LocalDesignerService.<>c__DisplayClass8.<CreateDesignerImpl>b__6(IRemoteDesignerService d) at Microsoft.Expression.DesignHost.Isolation.Remoting.ThreadMarshaler.<>c__DisplayClass4 1 func) at Microsoft.Expression.DesignHost.Isolation.Remoting.RemoteDesignerService.Microsoft.Expression.DesignHost.Isolation.Remoting.IRemoteDesignerService.CreateDesigner(IRemoteHostSourceItem remoteItem, IRemoteHostTextEditor remoteEditor, IRemoteCancellationToken remoteToken) at System.Runtime.Remoting.Messaging.StackBuilderSink._PrivateProcessMessage(IntPtr md, Object[] args, Object server, Object[]& outArgs) at System.Runtime.Remoting.Messaging.StackBuilderSink.SyncProcessMessage(IMessage msg) Exception rethrown at [0]: at System.Runtime.Remoting.Proxies.RealProxy.HandleReturnMessage(IMessage reqMsg, IMessage retMsg) at System.Runtime.Remoting.Proxies.RealProxy.PrivateInvoke(MessageData& msgData, Int32 type) at Microsoft.Expression.DesignHost.Isolation.Remoting.IRemoteDesignerService.CreateDesigner(IRemoteHostSourceItem remoteItem, IRemoteHostTextEditor remoteEditor, IRemoteCancellationToken cancelToken) at Microsoft.Expression.DesignHost.Isolation.Remoting.LocalDesignerService.<>c__DisplayClass8.<CreateDesignerImpl>b__6(IRemoteDesignerService d) at Microsoft.Expression.DesignHost.Isolation.Remoting.ThreadMarshaler.<>c__DisplayClass4 Microsoft.Expression.DesignHost.Isolation.Remoting.STAMarshaler.Call.InvokeWorker（）上的1 func) at Microsoft.Expression.DesignHost.Isolation.Remoting.RemoteDesignerService.Microsoft.Expression.DesignHost.Isolation.Remoting.IRemoteDesignerService.CreateDesigner(IRemoteHostSourceItem remoteItem, IRemoteHostTextEditor remoteEditor, IRemoteCancellationToken remoteToken) at System.Runtime.Remoting.Messaging.StackBuilderSink._PrivateProcessMessage(IntPtr md, Object[] args, Object server, Object[]& outArgs) at System.Runtime.Remoting.Messaging.StackBuilderSink.SyncProcessMessage(IMessage msg) Exception rethrown at [0]: at System.Runtime.Remoting.Proxies.RealProxy.HandleReturnMessage(IMessage reqMsg, IMessage retMsg) at System.Runtime.Remoting.Proxies.RealProxy.PrivateInvoke(MessageData& msgData, Int32 type) at Microsoft.Expression.DesignHost.Isolation.Remoting.IRemoteDesignerService.CreateDesigner(IRemoteHostSourceItem remoteItem, IRemoteHostTextEditor remoteEditor, IRemoteCancellationToken cancelToken) at Microsoft.Expression.DesignHost.Isolation.Remoting.LocalDesignerService.<>c__DisplayClass8.<CreateDesignerImpl>b__6(IRemoteDesignerService d) at Microsoft.Expression.DesignHost.Isolation.Remoting.ThreadMarshaler.<>c__DisplayClass4 2.b__3（）System.NullReferenceException對象引用未設置為對象的實例。 Microsoft.Expression.Platform.PlatformService.GetPlatformCreator（String at Microsoft.Expression.Platform.PlatformService.IsCompatibleFramework（FrameworkName hostFramework，FrameworkName guestFramework）的Microsoft.Expression.Platform.PlatformService.GetPlatformCreator（String） Microsoft.Expression.DesignSurface.Project.ProjectContextManager.GetSourceItemContext（IHostSourceItem sourceItem）在Microsoft.Expression.DesignSurface.DesignerService.CreateDesigner（IHostSourceItem項目，IHostTextItem項目，IHostTextEditor，IHostTextItem，IHostProject項目，IPlatform平台，布爾創建） Microsoft.Expression.DesignHost.Isolation.Remoting.RemoteDesignerService。<> c__DisplayClass10。<> c__DisplayClass12.b__f（CancellationToken cancelToken）上Microsoft.Expression.DesignHost.Isolation.Remoting.RemoteDesignerService.CallWithCancellation [TResult] 2 func) at Microsoft.Expression.DesignHost.Isolation.Remoting.RemoteDesignerService.<>c__DisplayClass10.<Microsoft.Expression.DesignHost.Isolation.Remoting.IRemoteDesignerService.CreateDesigner>b__e() at Microsoft.Expression.DesignHost.Isolation.Remoting.ThreadMarshaler.<>c__DisplayClass16 1.b__15（）在Microsoft.Expression.DesignHost.Isolation.Remoting.STAMarshaler.Call.InvokeWorker（）

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更多細節：

我在基於C＃的Windows Phone中創建的每種類型的項目中都存在錯誤（全景，databind應用，HTML5等）

我嘗試過的

如果您要解決的問題包括重新安裝，請不要打擾。 我已經嘗試了太多次了。

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我新安裝了帶有Blend的Visual Studio 2012。 在安裝時，我未選中Blend。 然后創建一個新的Windows Phone項目。 那花了4個小時下載了SDK（慢速網絡..不相關），然后在完成后重新啟動了計算機。 然后，我為Windows Phone創建了一個新項目。 並得到了相同的錯誤。 如果我缺少任何東西，請引導我。