Win32Exception: 操作成功完成。
--NativeErrorCode: 0
StackTrace:
   在 MS.Win32.UnsafeNativeMethods.RegisterClassEx(WNDCLASSEX_D wc_d)
   在 MS.Win32.HwndWrapper..ctor(Int32 classStyle, Int32 style, Int32 exStyle, Int32 x, Int32 y, Int32 width, Int32 height, String name, IntPtr parent, HwndWrapperHook[] hooks)
   在 System.Windows.Interop.HwndSource.Initialize(HwndSourceParameters parameters)
   在 System.Windows.Interop.HwndSource..ctor(HwndSourceParameters parameters)
   在 System.Windows.Controls.Primitives.Popup.PopupSecurityHelper.BuildWindow(Int32 x, Int32 y, Visual placementTarget, Boolean transparent, HwndSourceHook hook, AutoResizedEventHandler handler, HwndDpiChangedEventHandler dpiChangedHandler)
   在 System.Windows.Controls.Primitives.Popup.BuildWindow(Visual targetVisual)
   在 System.Windows.Controls.Primitives.Popup.CreateWindow(Boolean asyncCall)
   在 System.Windows.Controls.Primitives.Popup.OnIsOpenChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
   在 System.Windows.DependencyObject.OnPropertyChanged(DependencyPropertyChangedEventArgs e)
   在 System.Windows.FrameworkElement.OnPropertyChanged(DependencyPropertyChangedEventArgs e)
   在 System.Windows.DependencyObject.NotifyPropertyChange(DependencyPropertyChangedEventArgs args)
   在 System.Windows.DependencyObject.UpdateEffectiveValue(EntryIndex entryIndex, DependencyProperty dp, PropertyMetadata metadata, EffectiveValueEntry oldEntry, EffectiveValueEntry& newEntry, Boolean coerceWithDeferredReference, Boolean coerceWithCurrentValue, OperationType operationType)
   在 System.Windows.DependencyObject.CoerceValue(DependencyProperty dp)
   在 System.Windows.Controls.Primitives.Popup.<OpenOnLoad>b__23_0(Object param)
   在 System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
   在 System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler)