突然アプリケーションが落ちるので、Windowsイベントログを見ると、以下のエラーが確認できました。
Application: MapEditor.Wpf.exe Framework Version: v4.0.30319 Description: The application requested process termination through System.Environment.FailFast(string message). Message: Unrecoverable system error. Stack: at System.Environment.FailFast(System.String) at MS.Internal.Invariant.FailFast(System.String, System.String) at System.Windows.Documents.TextStore.VerifyTextStoreConsistency() at System.Windows.Documents.TextStore.GrantLock() at System.Windows.Documents.TextStore.GrantLockWorker(LockFlags) at System.Windows.Documents.TextStore.RequestLock(LockFlags, Int32 ByRef) at MS.Win32.UnsafeNativeMethods+ITfKeystrokeMgr.KeyDown(Int32, Int32, Boolean ByRef) at System.Windows.Input.TextServicesContext.Keystroke(Int32, Int32, KeyOp) at System.Windows.Input.TextServicesManager.TextServicesKeystroke(System.Windows.Input.TextServicesContext, System.Windows.Input.KeyEventArgs, Boolean) at System.Windows.Input.TextServicesManager.PostProcessInput(System.Object, System.Windows.Input.ProcessInputEventArgs) at System.Windows.Input.InputManager.RaiseProcessInputEventHandlers(System.Windows.Input.ProcessInputEventHandler, System.Windows.Input.ProcessInputEventArgs) at System.Windows.Input.InputManager.ProcessStagingArea() at System.Windows.Input.InputManager.ProcessInput(System.Windows.Input.InputEventArgs) at System.Windows.Input.InputProviderSite.ReportInput(System.Windows.Input.InputReport) at System.Windows.Interop.HwndKeyboardInputProvider.ReportInput(IntPtr, System.Windows.Input.InputMode, Int32, System.Windows.Input.RawKeyboardActions, Int32, Boolean, Boolean, Int32) at System.Windows.Interop.HwndKeyboardInputProvider.ProcessKeyAction(System.Windows.Interop.MSG ByRef, Boolean ByRef) at System.Windows.Interop.HwndSource.CriticalTranslateAccelerator(System.Windows.Interop.MSG ByRef, System.Windows.Input.ModifierKeys) at System.Windows.Interop.HwndSource.OnPreprocessMessage(System.Object) at System.Windows.Threading.ExceptionWrapper.InternalRealCall(System.Delegate, System.Object, Int32) at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(System.Object, System.Delegate, System.Object, Int32, System.Delegate) at System.Windows.Threading.Dispatcher.LegacyInvokeImpl(System.Windows.Threading.DispatcherPriority, System.TimeSpan, System.Delegate, System.Object, Int32) at System.Windows.Threading.Dispatcher.Invoke(System.Windows.Threading.DispatcherPriority, System.Delegate, System.Object) at System.Windows.Interop.HwndSource.OnPreprocessMessageThunk(System.Windows.Interop.MSG ByRef, Boolean ByRef) at System.Windows.Interop.HwndSource+WeakEventPreprocessMessage.OnPreprocessMessage(System.Windows.Interop.MSG ByRef, Boolean ByRef) at System.Windows.Interop.ThreadMessageEventHandler.Invoke(System.Windows.Interop.MSG ByRef, Boolean ByRef) at System.Windows.Interop.ComponentDispatcherThread.RaiseThreadMessage(System.Windows.Interop.MSG ByRef) at System.Windows.Threading.Dispatcher.PushFrameImpl(System.Windows.Threading.DispatcherFrame) at System.Windows.Threading.Dispatcher.PushFrame(System.Windows.Threading.DispatcherFrame) at System.Windows.Window.ShowHelper(System.Object) at System.Windows.Window.Show() at System.Windows.Window.ShowDialog() at MapEditor.Wpf.Principals.FormCache.ShowDatabase() at MapEditor.Wpf.Principals.ViewModels.ToolMenuViewModel+<>c.<.ctor>b__0_2(System.Object) at System.Reactive.AnonymousObserver`1[[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]].OnNextCore(System.__Canon) at System.Reactive.ObserverBase`1[[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]].OnNext(System.__Canon) at System.Reactive.Subjects.Subject`1[[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]].OnNext(System.__Canon) at Reactive.Bindings.ReactiveCommand`1[[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]].System.Windows.Input.ICommand.Execute(System.Object) at System.Windows.Input.CommandManager.TranslateInput(System.Windows.IInputElement, System.Windows.Input.InputEventArgs) at System.Windows.UIElement.OnKeyDownThunk(System.Object, System.Windows.Input.KeyEventArgs) at System.Windows.Input.KeyEventArgs.InvokeEventHandler(System.Delegate, System.Object) at System.Windows.RoutedEventArgs.InvokeHandler(System.Delegate, System.Object) at System.Windows.RoutedEventHandlerInfo.InvokeHandler(System.Object, System.Windows.RoutedEventArgs) at System.Windows.EventRoute.InvokeHandlersImpl(System.Object, System.Windows.RoutedEventArgs, Boolean) at System.Windows.UIElement.RaiseEventImpl(System.Windows.DependencyObject, System.Windows.RoutedEventArgs) at System.Windows.UIElement.RaiseTrustedEvent(System.Windows.RoutedEventArgs) at System.Windows.UIElement.RaiseEvent(System.Windows.RoutedEventArgs, Boolean) at System.Windows.Input.InputManager.ProcessStagingArea() at System.Windows.Input.InputManager.ProcessInput(System.Windows.Input.InputEventArgs) at System.Windows.Input.InputProviderSite.ReportInput(System.Windows.Input.InputReport) at System.Windows.Interop.HwndKeyboardInputProvider.ReportInput(IntPtr, System.Windows.Input.InputMode, Int32, System.Windows.Input.RawKeyboardActions, Int32, Boolean, Boolean, Int32) at System.Windows.Interop.HwndKeyboardInputProvider.ProcessKeyAction(System.Windows.Interop.MSG ByRef, Boolean ByRef) at System.Windows.Interop.HwndSource.CriticalTranslateAccelerator(System.Windows.Interop.MSG ByRef, System.Windows.Input.ModifierKeys) at System.Windows.Interop.HwndSource.OnPreprocessMessage(System.Object) at System.Windows.Threading.ExceptionWrapper.InternalRealCall(System.Delegate, System.Object, Int32) at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(System.Object, System.Delegate, System.Object, Int32, System.Delegate) at System.Windows.Threading.Dispatcher.LegacyInvokeImpl(System.Windows.Threading.DispatcherPriority, System.TimeSpan, System.Delegate, System.Object, Int32) at System.Windows.Threading.Dispatcher.Invoke(System.Windows.Threading.DispatcherPriority, System.Delegate, System.Object) at System.Windows.Interop.HwndSource.OnPreprocessMessageThunk(System.Windows.Interop.MSG ByRef, Boolean ByRef) at System.Windows.Interop.HwndSource+WeakEventPreprocessMessage.OnPreprocessMessage(System.Windows.Interop.MSG ByRef, Boolean ByRef) at System.Windows.Interop.ComponentDispatcherThread.RaiseThreadMessage(System.Windows.Interop.MSG ByRef) at System.Windows.Threading.Dispatcher.PushFrameImpl(System.Windows.Threading.DispatcherFrame) at System.Windows.Threading.Dispatcher.PushFrame(System.Windows.Threading.DispatcherFrame) at MapEditor.Wpf.MainWindow.DoEvents() at MapEditor.Wpf.MainWindow.OnContentRendered(System.Object, System.EventArgs) at System.Windows.Window.OnContentRendered(System.EventArgs) at System.Windows.Window.<PostContentRendered>b__202_0(System.Object) at System.Windows.Threading.ExceptionWrapper.InternalRealCall(System.Delegate, System.Object, Int32) at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(System.Object, System.Delegate, System.Object, Int32, System.Delegate) at System.Windows.Threading.DispatcherOperation.InvokeImpl() at System.Windows.Threading.DispatcherOperation.InvokeInSecurityContext(System.Object) at MS.Internal.CulturePreservingExecutionContext.CallbackWrapper(System.Object) at System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object, Boolean) at System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object, Boolean) at System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object) at MS.Internal.CulturePreservingExecutionContext.Run(MS.Internal.CulturePreservingExecutionContext, System.Threading.ContextCallback, System.Object) at System.Windows.Threading.DispatcherOperation.Invoke() at System.Windows.Threading.Dispatcher.ProcessQueue() at System.Windows.Threading.Dispatcher.WndProcHook(IntPtr, Int32, IntPtr, IntPtr, Boolean ByRef) at MS.Win32.HwndWrapper.WndProc(IntPtr, Int32, IntPtr, IntPtr, Boolean ByRef) at MS.Win32.HwndSubclass.DispatcherCallbackOperation(System.Object) at System.Windows.Threading.ExceptionWrapper.InternalRealCall(System.Delegate, System.Object, Int32) at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(System.Object, System.Delegate, System.Object, Int32, System.Delegate) at System.Windows.Threading.Dispatcher.LegacyInvokeImpl(System.Windows.Threading.DispatcherPriority, System.TimeSpan, System.Delegate, System.Object, Int32) at MS.Win32.HwndSubclass.SubclassWndProc(IntPtr, Int32, IntPtr, IntPtr) at MS.Win32.UnsafeNativeMethods.DispatchMessage(System.Windows.Interop.MSG ByRef) at System.Windows.Threading.Dispatcher.PushFrameImpl(System.Windows.Threading.DispatcherFrame) at System.Windows.Threading.Dispatcher.PushFrame(System.Windows.Threading.DispatcherFrame) at System.Windows.Application.RunDispatcher(System.Object) at System.Windows.Application.RunInternal(System.Windows.Window) at System.Windows.Application.Run(System.Windows.Window) at System.Windows.Application.Run() at MapEditor.Wpf.Program.Main()
しかし、デバッグすると、こんな感じで内部でエラーが出てました。
テキストフィールドにハンドリングしているイベントの処理で例外が起きていたようです。
