设计器 Unhandled Exception has occured 未经处理的异常 求解！

Windows.UI.Xaml.Markup.XamlParseException
XAML parsing failed.
at Windows.UI.Xaml.Application.LoadComponent(Object component, Uri resourceLocator)
at Microsoft.Expression.WindowsXamlPhonePlatform.InstanceBuilders.StatusBarStandIn..ctor()
at Microsoft.Expression.WindowsXamlPhonePlatform.InstanceBuilders.WindowsXamlPhoneOverlayLayer..ctor()
at Microsoft.Expression.WindowsXamlPlatform.Views.WindowsXamlPhoneImageHost.WindowsXamlPhoneSceneWrapper.CreateOverlayLayer()
at Microsoft.Expression.WindowsXamlPlatform.Views.WindowsUIXamlImageHost.WindowsXamlSceneWrapper..ctor()
at Microsoft.Expression.WindowsXamlPlatform.Views.WindowsXamlPhoneImageHost.CreateSceneWrapper()
at Microsoft.Expression.WindowsXamlPlatform.Views.WindowsUIXamlImageHost.get_RootInstanceWrapper()
at Microsoft.Expression.WindowsXamlPlatform.Views.WindowsUIXamlImageHost.get_OverlayLayer()
at Microsoft.Expression.WindowsXamlPlatform.Views.WindowsXamlSceneView.get_OverlayLayer()
at Microsoft.Expression.WindowsXamlPhonePlatform.UserInterface.PlatformPane.WindowsXamlPhonePlatformPaneModel.UpdateStatusBarVisibility()
at Microsoft.Expression.DesignSurface.UserInterface.PlatformPane.PlatformPaneModel.set_SceneViewContract(SceneViewContract value)
at Microsoft.Expression.WindowsXamlPlatform.UserInterface.PlatformPane.WindowsUIXamlPlatformPaneModel.UpdateContract()
at Microsoft.Expression.WindowsXamlPlatform.UserInterface.PlatformPane.WindowsUIXamlPlatformPaneModel.OnSubscriptionBasisNodeInserted(SceneNode newBasisNode, DocumentNode basisContent)
at Microsoft.Expression.DesignSurface.UserInterface.PlatformPane.PlatformPaneModel.Subscription_BasisNodeInserted(Object sender, SceneNode newBasisNode, DocumentNode basisContent)
at Microsoft.Expression.DesignSurface.ViewModel.SceneNodeSubscription`2.OnBasisNodeInserted(BasisNodeHolder holder)
at Microsoft.Expression.DesignSurface.ViewModel.SceneNodeSubscription`2.SetBasisNodesWorker(SceneViewModel viewModel, DocumentNodeMarkerSortedListOf`1 newBasisNodeList)
at Microsoft.Expression.DesignSurface.ViewModel.SceneNodeSubscription`2.SetBasisNodes(SceneViewModel viewModel, IEnumerable`1 basisNodes)
at Microsoft.Expression.DesignSurface.UserInterface.PlatformPane.PlatformPaneModel.set_ActiveView(IDeviceOptionsView value)
at Microsoft.Expression.DesignSurface.UserInterface.PlatformPane.PlatformPaneService.GetModel(SceneView sceneView, Boolean setActiveView)
at Microsoft.Expression.DesignSurface.UserInterface.PlatformPane.PlatformPaneService.UpdateActiveModel(SceneView view)
at Microsoft.Expression.DesignSurface.UserInterface.PlatformPane.PlatformPaneService.DocumentViewContext_ActiveViewChanged(Object sender, ViewChangedEventArgs e)
at System.EventHandler`1.Invoke(Object sender, TEventArgs e)
at Microsoft.Expression.DesignSurface.DocumentViewContext.OnActiveViewChanged(ViewChangedEventArgs e)
at Microsoft.Expression.DesignSurface.DocumentViewContext.SetActiveDocumentAndView(SceneView view, Item item, HostViewEventArgs e)
at Microsoft.Expression.DesignSurface.DocumentViewContext.SetActiveView(SceneView view, HostViewEventArgs e)
at Microsoft.Expression.DesignSurface.DocumentViewContext.CreateAndOpenViewInternal(SceneDocument document, CancellationToken cancelToken, Boolean activate, Boolean ensureOpenInHost)
at Microsoft.Expression.DesignSurface.DesignerService.CreateDesigner(IHostSourceItem item, IHostTextEditor editor, CancellationToken cancelToken)
at Microsoft.Expression.DesignHost.Isolation.Remoting.RemoteDesignerService.<>c__DisplayClass13.<Microsoft.Expression.DesignHost.Isolation.Remoting.IRemoteDesignerService.CreateDesigner>b__12(CancellationToken cancelToken)
at Microsoft.Expression.DesignHost.Isolation.Remoting.RemoteDesignerService.<>c__DisplayClass3`1.<MarshalInWithCancellation>b__2()
at Microsoft.Expression.DesignHost.Isolation.Remoting.STAMarshaler.Call.InvokeWorker()Windows.UI.Xaml.Markup.XamlParseException
XAML parsing failed.Server stack trace:
at Microsoft.Expression.DesignHost.Isolation.Remoting.STAMarshaler.WaitForCompletion(NestedCallContext nestedCallContext, BlockingCall call, WaitHandle timeoutSignal)
at Microsoft.Expression.DesignHost.Isolation.Remoting.STAMarshaler.MarshalInSynchronous(Action action, Int32 targetApartmentId, CancellationToken cancelToken, CallModality callModality, String methodName, String filePath, Int32 lineNumber)
at Microsoft.Expression.DesignHost.Isolation.Remoting.STAMarshaler.MarshalIn(Action action, Int32 targetApartmentId, CancellationToken cancelToken, CallSynchronizationMode syncMode, CallModality callModality, String methodName, String filePath, Int32 lineNumber)
at Microsoft.Expression.DesignHost.Isolation.Remoting.ThreadMarshaler.MarshalIn(IRemoteObject targetObject, Action action, CancellationToken cancelToken, CallSynchronizationMode syncMode, CallModality callModality, ApartmentState apartmentState, String memberName, String filePath, Int32 lineNumber)
at Microsoft.Expression.DesignHost.Isolation.Remoting.RemoteDesignerService.MarshalInWithCancellation[TResult](IRemoteCancellationToken remoteToken, Func`2 func, ApartmentState apartmentState)
at Microsoft.Expression.DesignHost.Isolation.Remoting.RemoteDesignerService.Microsoft.Expression.DesignHost.Isolation.Remoting.IRemoteDesignerService.CreateDesigner(IRemoteHostProject remoteProject, 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(IRemoteHostProject remoteProject, IRemoteHostSourceItem remoteItem, IRemoteHostTextEditor remoteEditor, IRemoteCancellationToken cancelToken)
at Microsoft.Expression.DesignHost.Isolation.Remoting.LocalDesignerService.CreateDesignerImpl(IRemoteDesignerService ds, IHostSourceItem item, IHostTextEditor editor, RemoteCancellationToken remoteCancelToken)
at Microsoft.Expression.DesignHost.Isolation.Remoting.LocalDesignerService.<>c__DisplayClass19.<Microsoft.Expression.DesignHost.IDesignerService.CreateDesigner>b__18(IRemoteDesignerService ds, RemoteCancellationToken remoteToken)
at Microsoft.Expression.DesignHost.Isolation.Remoting.LocalDesignerService.<>c__DisplayClass5`1.<MarshalOutWithCancellation>b__4(IRemoteDesignerService ds)
at Microsoft.Expression.DesignHost.Isolation.Remoting.ThreadMarshaler.<>c__DisplayClass1`1.<MarshalOut>b__0()
at Microsoft.Expression.DesignHost.Isolation.Remoting.STAMarshaler.Call.InvokeWorker()Windows.UI.Xaml.Markup.XamlParseException
XAML parsing failed.
at Microsoft.Expression.DesignHost.Isolation.Remoting.STAMarshaler.WaitForCompletion(NestedCallContext nestedCallContext, BlockingCall call, WaitHandle timeoutSignal)
at Microsoft.Expression.DesignHost.Isolation.Remoting.STAMarshaler.MarshalOutSynchronous(Action action, Int32 targetApartmentId, WaitHandle aborted, WaitHandle timeoutSignal, CancellationToken cancelToken, String methodName, String filePath, Int32 lineNumber)
at Microsoft.Expression.DesignHost.Isolation.Remoting.STAMarshaler.MarshalOut(Action action, Int32 targetApartmentId, WaitHandle aborted, CancellationToken cancelToken, CallSynchronizationMode syncMode, WaitHandle timeoutSignal, String methodName, String filePath, Int32 lineNumber)
at Microsoft.Expression.DesignHost.Isolation.Remoting.ThreadMarshaler.MarshalOut[TValue](RemoteHandle`1 targetObject, Action action, CancellationToken cancelToken, CallSynchronizationMode syncMode, ApartmentState apartmentState, String methodName, String filePath, Int32 lineNumber)
at Microsoft.Expression.DesignHost.Isolation.Remoting.ThreadMarshaler.MarshalOut[TValue](RemoteHandle`1 targetObject, Action`1 action, CancellationToken cancelToken, CallSynchronizationMode syncMode, ApartmentState apartmentState, String methodName, String filePath, Int32 lineNumber)
at Microsoft.Expression.DesignHost.Isolation.Remoting.LocalDesignerService.MarshalOutWithCancellation[TResult](CancellationToken cancelToken, Func`3 func, ApartmentState apartmentState)
at Microsoft.Expression.DesignHost.Isolation.Remoting.LocalDesignerService.Microsoft.Expression.DesignHost.IDesignerService.CreateDesigner(IHostSourceItem item, IHostTextEditor editor, CancellationToken cancelToken)
at Microsoft.Expression.DesignHost.IsolatedDesignerService.IsolatedDesignerView.CreateDesignerViewInfo(CancellationToken cancelToken)