Windows Phone 开发---一些错误

1.最近，用VS2012+WP SDK8.0更新之前编写的一个软件时，遇到一个错误。

Microsoft.Expression.DesignHost.Isolation.Remoting.RemoteException
Set connectionId threw an exception.
   at System.Windows.Markup.WpfXamlLoader.Load(XamlReader xamlReader, IXamlObjectWriterFactory writerFactory, Boolean skipJournaledProperties, Object rootObject, XamlObjectWriterSettings settings, Uri baseUri)
   at System.Windows.Markup.WpfXamlLoader.LoadBaml(XamlReader xamlReader, Boolean skipJournaledProperties, Object rootObject, XamlAccessLevel accessLevel, Uri baseUri)
   at System.Windows.Markup.XamlReader.LoadBaml(Stream stream, ParserContext parserContext, Object parent, Boolean closeStream)
   at System.Windows.Application.LoadComponent(Object component, Uri resourceLocator)
   at Microsoft.Expression.DesignSurface.UserInterface.PlatformPane.PlatformPane.InitializeComponent()
   at Microsoft.Expression.DesignSurface.UserInterface.PlatformPane.PlatformPane..ctor(DesignerContext context)
   at Microsoft.Expression.DesignSurface.UserInterface.WindowContext.<.ctor>b__b()
   at Microsoft.Expression.DesignSurface.UserInterface.WindowContext.GetToolWindow(String identifier)
   at Microsoft.Expression.DesignSurface.DesignerService.GetToolWindow(String identifier)
   at Microsoft.Expression.DesignHost.Isolation.Remoting.RemoteDesignerService.<>c__DisplayClass10.<Microsoft.Expression.DesignHost.Isolation.Remoting.IRemoteDesignerService.GetToolWindow>b__f()
   at Microsoft.Expression.DesignHost.Isolation.Remoting.ThreadMarshaler.<>c__DisplayClass19`1.<MarshalIn>b__18()
   at Microsoft.Expression.DesignHost.Isolation.Remoting.STAMarshaler.Call.InvokeWorker()
   at Microsoft.Expression.DesignHost.Isolation.Remoting.STAMarshaler.Call.Invoke()
   at Microsoft.Expression.DesignHost.Isolation.Remoting.STAMarshaler.InvokeCall(Call call)
   at Microsoft.Expression.DesignHost.Isolation.Remoting.STAMarshaler.ProcessQueue(CallQueue queue)
   at Microsoft.Expression.DesignHost.Isolation.Remoting.STAMarshaler.ProcessInboundQueue(Int32 identity)
   at Microsoft.Expression.DesignHost.Isolation.Remoting.STAMarshaler.OnWindowMessage(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
   at Microsoft.Expression.DesignHost.Isolation.Remoting.MessageOnlyHwndWrapper.WndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam)
   at MS.Win32.UnsafeNativeMethods.DispatchMessage(MSG& msg)
   at System.Windows.Threading.Dispatcher.PushFrameImpl(DispatcherFrame frame)
   at System.Windows.Threading.Dispatcher.PushFrame(DispatcherFrame frame)
   at System.Windows.Threading.Dispatcher.Run()
   at System.Windows.Application.RunDispatcher(Object ignore)
   at System.Windows.Application.RunInternal(Window window)
   at System.Windows.Application.Run(Window window)
   at System.Windows.Application.Run()
   at Microsoft.Expression.DesignHost.Isolation.IsolationProcess.RunApplication()
   at Microsoft.Expression.DesignHost.Isolation.IsolationProcess.DesignProcessViewProvider.<>c__DisplayClass7.<applicationView_Activated>b__6()
   at System.Threading.ThreadHelper.ThreadStart_Context(Object state)
   at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
   at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
   at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
   at System.Threading.ThreadHelper.ThreadStart()

Microsoft.Expression.DesignHost.Isolation.Remoting.RemoteException
无法将类型为“System.Windows.Controls.CheckBox”的对象强制转换为类型“Microsoft.Expression.Utility.ValueEditors.ChoiceEditor”。
   at Microsoft.Expression.DesignSurface.UserInterface.PlatformPane.PlatformPane.System.Windows.Markup.IComponentConnector.Connect(Int32 connectionId, Object target)
   at MS.Internal.Xaml.Runtime.ClrObjectRuntime.SetConnectionId(Object root, Int32 connectionId, Object instance)

与此相同

http://social.msdn.microsoft.com/Forums/id-ID/winstoreappzhcn/thread/7c6e5cd5-252e-4a99-89ac-29a383858b26

看了下http://blendinsider.com/xaml/known-issue-xaml-designer-in-visual-studio-11-beta-crashes-on-launch-2012-03-07/，里面有说到权限，我一想，很有可能是权限不足，导致XAML解析器无法加载某些文件，一试，还真是，重新清理下解决方案，然后重新以管理员权限打开解决方案即可。