Exception Info: System.InvalidCastException: Unable to cast object of type 'System.__ComObject' to type 'ITfThreadMgr'.

Question

在使用wpf 多次打开关闭同一窗体后，部分电脑会出现输入法报错，导致软件崩溃，请问这是什么原因造成的，使用了捕获异常的软件还是崩溃了，怎么操作能使软件不崩溃呢？

TaskScheduler.UnobservedTaskException += TaskScheduler_UnobservedTaskException;

Application.Current.DispatcherUnhandledException += App_DispatcherUnhandledException;（实现了 e.Handled = true;）

AppDomain.CurrentDomain.UnhandledException += CurrentDomain_UnhandledException;

通过附加进程获取到的报错信息如下：

捕获的错误信息如下：

Description: The process was terminated due to an unhandled exception.

Exception Info: System.InvalidCastException: Unable to cast object of type 'System.__ComObject' to type 'ITfThreadMgr'.

at System.StubHelpers.InterfaceMarshaler.ConvertToManaged(IntPtr& ppUnk, IntPtr itfMT, IntPtr classMT, Int32 flags)

at MS.Win32.UnsafeNativeMethods.TF_CreateThreadMgr(ITfThreadMgr& threadManager)

at MS.Internal.TextServicesLoader.Load()

at System.Windows.Threading.Dispatcher.GetMessagePump()

at System.Windows.Threading.Dispatcher.GetMessage(MSG& msg, IntPtr hwnd, Int32 minMessage, Int32 maxMessage)

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()

at iTour.App.Main()