I'm using the Docking control and TabControl. When I open a Tab which contains a TimeSpanPicker, the application crashes. Exception Info: System.NullReferenceException at Telerik.Windows.Automation.Peers.RadTimeSpanPickerAutomationPeer.GetChildrenCore() at System.Windows.Automation.Peers.AutomationPeer.EnsureChildren() at System.Windows.Automation.Peers.AutomationPeer.GetChildren() at System.Windows.Automation.Peers.AutomationPeer.isDescendantOf(System.Windows.Automation.Peers.AutomationPeer) at System.Windows.Automation.Peers.AutomationPeer.isDescendantOf(System.Windows.Automation.Peers.AutomationPeer) at System.Windows.Automation.Peers.AutomationPeer.isDescendantOf(System.Windows.Automation.Peers.AutomationPeer) at System.Windows.Automation.Peers.AutomationPeer.isDescendantOf(System.Windows.Automation.Peers.AutomationPeer) at System.Windows.Automation.Peers.AutomationPeer.isDescendantOf(System.Windows.Automation.Peers.AutomationPeer) at System.Windows.Automation.Peers.AutomationPeer.isDescendantOf(System.Windows.Automation.Peers.AutomationPeer) at System.Windows.Automation.Peers.AutomationPeer.isDescendantOf(System.Windows.Automation.Peers.AutomationPeer) at System.Windows.Automation.Peers.AutomationPeer.isDescendantOf(System.Windows.Automation.Peers.AutomationPeer) at System.Windows.Automation.Peers.AutomationPeer.isDescendantOf(System.Windows.Automation.Peers.AutomationPeer) at System.Windows.Automation.Peers.AutomationPeer.isDescendantOf(System.Windows.Automation.Peers.AutomationPeer) at System.Windows.Automation.Peers.AutomationPeer.isDescendantOf(System.Windows.Automation.Peers.AutomationPeer) at System.Windows.Automation.Peers.AutomationPeer.ValidateConnected(System.Windows.Automation.Peers.AutomationPeer) at MS.Internal.Automation.ElementProxy.StaticWrap(System.Windows.Automation.Peers.AutomationPeer, System.Windows.Automation.Peers.AutomationPeer) at System.Windows.Automation.Peers.AutomationPeer.ProviderFromPeer(System.Windows.Automation.Peers.AutomationPeer) at System.Windows.Automation.Peers.AutomationPeer.RaiseAutomationEvent(System.Windows.Automation.Peers.AutomationEvents) at Telerik.Windows.Automation.Peers.RadComboBoxAutomationPeer.RaiseSelectionEvents(System.Windows.Controls.SelectionChangedEventArgs) at Telerik.Windows.Controls.RadComboBox.OnSelectionChanged(System.Windows.Controls.SelectionChangedEventArgs) at System.Windows.Controls.Primitives.Selector.InvokeSelectionChanged(System.Collections.Generic.List`1<ItemInfo>, System.Collections.Generic.List`1<ItemInfo>) at System.Windows.Controls.Primitives.Selector+SelectionChanger.End() at System.Windows.Controls.Primitives.Selector+SelectionChanger.SelectJustThisItem(ItemInfo, Boolean) at System.Windows.Controls.Primitives.Selector.SelectItemWithValue(System.Object) at System.Windows.Controls.Primitives.Selector.CoerceSelectedValue(System.Windows.DependencyObject, System.Object) at System.Windows.DependencyObject.ProcessCoerceValue(System.Windows.DependencyProperty, System.Windows.PropertyMetadata, System.Windows.EntryIndex ByRef, Int32 ByRef, System.Windows.EffectiveValueEntry ByRef, System.Windows.EffectiveValueEntry ByRef, System.Object ByRef, System.Object, System.Object, System.Windows.CoerceValueCallback, Boolean, Boolean, Boolean) at System.Windows.DependencyObject.UpdateEffectiveValue(System.Windows.EntryIndex, System.Windows.DependencyProperty, System.Windows.PropertyMetadata, System.Windows.EffectiveValueEntry, System.Windows.EffectiveValueEntry ByRef, Boolean, Boolean, System.Windows.OperationType) at System.Windows.DependencyObject.SetValueCommon(System.Windows.DependencyProperty, System.Object, System.Windows.PropertyMetadata, Boolean, Boolean, System.Windows.OperationType, Boolean) at System.Windows.DependencyObject.SetValue(System.Windows.DependencyProperty, System.Object) at Telerik.Windows.Controls.LookupValueConverter.Convert(System.Object, System.Type, System.Object, System.Globalization.CultureInfo) at Telerik.Windows.Controls.GridViewComboBoxColumn.GetCellContent(System.Object) at Telerik.Windows.Controls.GridView.GridViewCell.UpdateValue() at Telerik.Windows.Controls.GridView.GridViewCell.SetCellElement() at Telerik.Windows.Controls.GridView.GridViewRow.PrepareCell(Telerik.Windows.Controls.GridView.GridViewCellBase, Telerik.Windows.Controls.GridView.IColumnElement) at Telerik.Windows.Controls.GridView.GridViewCellsPanel.PrepareCell(Telerik.Windows.Controls.GridView.GridViewCellBase, Telerik.Windows.Controls.GridView.IColumnElement) at Telerik.Windows.Controls.GridView.GridViewCellsPanel.GetVirtualizedCell(Telerik.Windows.Controls.GridView.IColumnElement, Boolean) at Telerik.Windows.Controls.GridView.GridViewCellsPanel.RealizeAndMeasureCells(Int32, Int32, System.Func`2<Int32,Int32>) at Telerik.Windows.Controls.GridView.GridViewCellsPanel.UpdateVirtualizedCells() at Telerik.Windows.Controls.GridView.GridViewCellsPanel.MeasureOverride(System.Windows.Size) at System.Windows.FrameworkElement.MeasureCore(System.Windows.Size) at System.Windows.UIElement.Measure(System.Windows.Size) at MS.Internal.Helper.MeasureElementWithSingleChild(System.Windows.UIElement, System.Windows.Size) at System.Windows.Controls.ItemsPresenter.MeasureOverride(System.Windows.Size) at System.Windows.FrameworkElement.MeasureCore(System.Windows.Size) at System.Windows.UIElement.Measure(System.Windows.Size) at System.Windows.Controls.Grid.MeasureOverride(System.Windows.Size) at System.Windows.FrameworkElement.MeasureCore(System.Windows.Size) at System.Windows.UIElement.Measure(System.Windows.Size) at System.Windows.Controls.Control.MeasureOverride(System.Windows.Size) at System.Windows.FrameworkElement.MeasureCore(System.Windows.Size) at System.Windows.UIElement.Measure(System.Windows.Size) at System.Windows.Controls.Grid.MeasureCell(Int32, Boolean) at System.Windows.Controls.Grid.MeasureCellsGroup(Int32, System.Windows.Size, Boolean, Boolean, Boolean ByRef) at System.Windows.Controls.Grid.MeasureOverride(System.Windows.Size) at System.Windows.FrameworkElement.MeasureCore(System.Windows.Size) at System.Windows.UIElement.Measure(System.Windows.Size) at System.Windows.Controls.Grid.MeasureOverride(System.Windows.Size) at System.Windows.FrameworkElement.MeasureCore(System.Windows.Size) at System.Windows.UIElement.Measure(System.Windows.Size) at System.Windows.Controls.Control.MeasureOverride(System.Windows.Size) at Telerik.Windows.Controls.GridView.GridViewRowItem.MeasureOverride(System.Windows.Size) at System.Windows.FrameworkElement.MeasureCore(System.Windows.Size) at System.Windows.UIElement.Measure(System.Windows.Size) at Telerik.Windows.Controls.GridView.GridViewVirtualizingPanel+NestedLayoutStrategy.MeasureChild(System.Windows.UIElement, System.Windows.Size, Int32) at Telerik.Windows.Controls.GridView.GridViewVirtualizingPanel+NestedLayoutStrategy.MeasureOverride(System.Windows.Size) at Telerik.Windows.Controls.GridView.GridViewVirtualizingPanel.MeasureOverride(System.Windows.Size) at System.Windows.FrameworkElement.MeasureCore(System.Windows.Size) at System.Windows.UIElement.Measure(System.Windows.Size) at MS.Internal.Helper.MeasureElementWithSingleChild(System.Windows.UIElement, System.Windows.Size) at System.Windows.Controls.ScrollContentPresenter.MeasureOverride(System.Windows.Size) at System.Windows.FrameworkElement.MeasureCore(System.Windows.Size) at System.Windows.UIElement.Measure(System.Windows.Size) at System.Windows.Controls.Grid.MeasureCell(Int32, Boolean) at System.Windows.Controls.Grid.MeasureCellsGroup(Int32, System.Windows.Size, Boolean, Boolean, Boolean ByRef) at System.Windows.Controls.Grid.MeasureCellsGroup(Int32, System.Windows.Size, Boolean, Boolean) at System.Windows.Controls.Grid.MeasureOverride(System.Windows.Size) at System.Windows.FrameworkElement.MeasureCore(System.Windows.Size) at System.Windows.UIElement.Measure(System.Windows.Size) at System.Windows.Controls.ScrollViewer.MeasureOverride(System.Windows.Size) at Telerik.Windows.Controls.GridView.GridViewScrollViewer.MeasureOverride(System.Windows.Size) at System.Windows.FrameworkElement.MeasureCore(System.Windows.Size) at System.Windows.UIElement.Measure(System.Windows.Size) at System.Windows.Controls.Grid.MeasureCell(Int32, Boolean) at System.Windows.Controls.Grid.MeasureCellsGroup(Int32, System.Windows.Size, Boolean, Boolean, Boolean ByRef) at System.Windows.Controls.Grid.MeasureCellsGroup(Int32, System.Windows.Size, Boolean, Boolean) at System.Windows.Controls.Grid.MeasureOverride(System.Windows.Size) at System.Windows.FrameworkElement.MeasureCore(System.Windows.Size) at System.Windows.UIElement.Measure(System.Windows.Size) at System.Windows.Controls.Grid.MeasureOverride(System.Windows.Size) at System.Windows.FrameworkElement.MeasureCore(System.Windows.Size) at System.Windows.UIElement.Measure(System.Windows.Size) at System.Windows.Controls.Control.MeasureOverride(System.Windows.Size) at Telerik.Windows.Controls.GridView.GridViewDataControl.MeasureOverride(System.Windows.Size) at System.Windows.FrameworkElement.MeasureCore(System.Windows.Size) at System.Windows.UIElement.Measure(System.Windows.Size) at System.Windows.Controls.Grid.MeasureCell(Int32, Boolean) at System.Windows.Controls.Grid.MeasureCellsGroup(Int32, System.Windows.Size, Boolean, Boolean, Boolean ByRef) at System.Windows.Controls.Grid.MeasureCellsGroup(Int32, System.Windows.Size, Boolean, Boolean) at System.Windows.Controls.Grid.MeasureOverride(System.Windows.Size) at System.Windows.FrameworkElement.MeasureCore(System.Windows.Size) at System.Windows.UIElement.Measure(System.Windows.Size) at MS.Internal.Helper.MeasureElementWithSingleChild(System.Windows.UIElement, System.Windows.Size) at System.Windows.Controls.ContentPresenter.MeasureOverride(System.Windows.Size) at System.Windows.FrameworkElement.MeasureCore(System.Windows.Size) at System.Windows.UIElement.Measure(System.Windows.Size) at System.Windows.Controls.Border.MeasureOverride(System.Windows.Size) at System.Windows.FrameworkElement.MeasureCore(System.Windows.Size) at System.Windows.UIElement.Measure(System.Windows.Size) at System.Windows.Controls.Control.MeasureOverride(System.Windows.Size) at System.Windows.FrameworkElement.MeasureCore(System.Windows.Size) at System.Windows.UIElement.Measure(System.Windows.Size) at MS.Internal.Helper.MeasureElementWithSingleChild(System.Windows.UIElement, System.Windows.Size) at System.Windows.Controls.ContentPresenter.MeasureOverride(System.Windows.Size) at System.Windows.FrameworkElement.MeasureCore(System.Windows.Size) at System.Windows.UIElement.Measure(System.Windows.Size) at System.Windows.Controls.Grid.MeasureOverride(System.Windows.Size) at System.Windows.FrameworkElement.MeasureCore(System.Windows.Size) at System.Windows.UIElement.Measure(System.Windows.Size) at System.Windows.Controls.Grid.MeasureOverride(System.Windows.Size) at System.Windows.FrameworkElement.MeasureCore(System.Windows.Size) at System.Windows.UIElement.Measure(System.Windows.Size) at System.Windows.Controls.Border.MeasureOverride(System.Windows.Size) at System.Windows.FrameworkElement.MeasureCore(System.Windows.Size) at System.Windows.UIElement.Measure(System.Windows.Size) at Telerik.Windows.Controls.RadDockPanel.MeasureOverride(System.Windows.Size) at System.Windows.FrameworkElement.MeasureCore(System.Windows.Size) at System.Windows.UIElement.Measure(System.Windows.Size) at System.Windows.Controls.Grid.MeasureOverride(System.Windows.Size) at System.Windows.FrameworkElement.MeasureCore(System.Windows.Size) at System.Windows.UIElement.Measure(System.Windows.Size) at System.Windows.Controls.Control.MeasureOverride(System.Windows.Size) at System.Windows.FrameworkElement.MeasureCore(System.Windows.Size) at System.Windows.UIElement.Measure(System.Windows.Size) at System.Windows.Controls.Grid.MeasureOverride(System.Windows.Size) at System.Windows.FrameworkElement.MeasureCore(System.Windows.Size) at System.Windows.UIElement.Measure(System.Windows.Size) at MS.Internal.Helper.MeasureElementWithSingleChild(System.Windows.UIElement, System.Windows.Size) at System.Windows.Controls.ContentPresenter.MeasureOverride(System.Windows.Size) at System.Windows.FrameworkElement.MeasureCore(System.Windows.Size) at System.Windows.UIElement.Measure(System.Windows.Size) at System.Windows.Controls.Border.MeasureOverride(System.Windows.Size) at System.Windows.FrameworkElement.MeasureCore(System.Windows.Size) at System.Windows.UIElement.Measure(System.Windows.Size) at System.Windows.Controls.Control.MeasureOverride(System.Windows.Size) at System.Windows.FrameworkElement.MeasureCore(System.Windows.Size) at System.Windows.UIElement.Measure(System.Windows.Size) at MS.Internal.Helper.MeasureElementWithSingleChild(System.Windows.UIElement, System.Windows.Size) at System.Windows.Controls.ContentPresenter.MeasureOverride(System.Windows.Size) at System.Windows.FrameworkElement.MeasureCore(System.Windows.Size) at System.Windows.UIElement.Measure(System.Windows.Size) at System.Windows.Controls.Grid.MeasureOverride(System.Windows.Size) at System.Windows.FrameworkElement.MeasureCore(System.Windows.Size) at System.Windows.UIElement.Measure(System.Windows.Size) at System.Windows.Controls.Grid.MeasureOverride(System.Windows.Size) at System.Windows.FrameworkElement.MeasureCore(System.Windows.Size) at System.Windows.UIElement.Measure(System.Windows.Size) at System.Windows.Controls.Border.MeasureOverride(System.Windows.Size) at System.Windows.FrameworkElement.MeasureCore(System.Windows.Size) at System.Windows.UIElement.Measure(System.Windows.Size) at System.Windows.Controls.Border.MeasureOverride(System.Windows.Size) at System.Windows.FrameworkElement.MeasureCore(System.Windows.Size) at System.Windows.UIElement.Measure(System.Windows.Size) at System.Windows.Controls.Grid.MeasureCell(Int32, Boolean) at System.Windows.Controls.Grid.MeasureCellsGroup(Int32, System.Windows.Size, Boolean, Boolean, Boolean ByRef) at System.Windows.Controls.Grid.MeasureCellsGroup(Int32, System.Windows.Size, Boolean, Boolean) at System.Windows.Controls.Grid.MeasureOverride(System.Windows.Size) at System.Windows.FrameworkElement.MeasureCore(System.Windows.Size) at System.Windows.UIElement.Measure(System.Windows.Size) at System.Windows.Controls.Control.MeasureOverride(System.Windows.Size) at System.Windows.FrameworkElement.MeasureCore(System.Windows.Size) at System.Windows.UIElement.Measure(System.Windows.Size) at Telerik.Windows.Controls.ProportionalStackPanel.MeasureOverride(System.Windows.Size) at System.Windows.FrameworkElement.MeasureCore(System.Windows.Size) at System.Windows.UIElement.Measure(System.Windows.Size) at MS.Internal.Helper.MeasureElementWithSingleChild(System.Windows.UIElement, System.Windows.Size) at System.Windows.Controls.ItemsPresenter.MeasureOverride(System.Windows.Size) at System.Windows.FrameworkElement.MeasureCore(System.Windows.Size) at System.Windows.UIElement.Measure(System.Windows.Size) at System.Windows.Controls.Border.MeasureOverride(System.Windows.Size) at System.Windows.FrameworkElement.MeasureCore(System.Windows.Size) at System.Windows.UIElement.Measure(System.Windows.Size) at System.Windows.Controls.Grid.MeasureOverride(System.Windows.Size) at System.Windows.FrameworkElement.MeasureCore(System.Windows.Size) at System.Windows.UIElement.Measure(System.Windows.Size) at System.Windows.Controls.Control.MeasureOverride(System.Windows.Size) at System.Windows.FrameworkElement.MeasureCore(System.Windows.Size) at System.Windows.UIElement.Measure(System.Windows.Size) at MS.Internal.Helper.MeasureElementWithSingleChild(System.Windows.UIElement, System.Windows.Size) at System.Windows.Controls.ContentPresenter.MeasureOverride(System.Windows.Size) at System.Windows.FrameworkElement.MeasureCore(System.Windows.Size) at System.Windows.UIElement.Measure(System.Windows.Size) at System.Windows.Controls.Border.MeasureOverride(System.Windows.Size) at System.Windows.FrameworkElement.MeasureCore(System.Windows.Size) at System.Windows.UIElement.Measure(System.Windows.Size) at System.Windows.Controls.Control.MeasureOverride(System.Windows.Size) at System.Windows.FrameworkElement.MeasureCore(System.Windows.Size) at System.Windows.UIElement.Measure(System.Windows.Size) at Telerik.Windows.Controls.RadDockPanel.MeasureOverride(System.Windows.Size) at Telerik.Windows.Controls.DockingPanel.MeasureOverride(System.Windows.Size) at System.Windows.FrameworkElement.MeasureCore(System.Windows.Size) at System.Windows.UIElement.Measure(System.Windows.Size) at Telerik.Windows.Controls.RadDockPanel.MeasureOverride(System.Windows.Size) at System.Windows.FrameworkElement.MeasureCore(System.Windows.Size) at System.Windows.UIElement.Measure(System.Windows.Size) at System.Windows.Controls.Border.MeasureOverride(System.Windows.Size) at System.Windows.FrameworkElement.MeasureCore(System.Windows.Size) at System.Windows.UIElement.Measure(System.Windows.Size) at System.Windows.Controls.Grid.MeasureOverride(System.Windows.Size) at System.Windows.FrameworkElement.MeasureCore(System.Windows.Size) at System.Windows.UIElement.Measure(System.Windows.Size) at System.Windows.Controls.Control.MeasureOverride(System.Windows.Size) at Telerik.Windows.Controls.RadDocking.MeasureOverride(System.Windows.Size) at System.Windows.FrameworkElement.MeasureCore(System.Windows.Size) at System.Windows.UIElement.Measure(System.Windows.Size) at MS.Internal.Helper.MeasureElementWithSingleChild(System.Windows.UIElement, System.Windows.Size) at System.Windows.Controls.ContentPresenter.MeasureOverride(System.Windows.Size) at System.Windows.FrameworkElement.MeasureCore(System.Windows.Size) at System.Windows.UIElement.Measure(System.Windows.Size) at System.Windows.Controls.Control.MeasureOverride(System.Windows.Size) at System.Windows.FrameworkElement.MeasureCore(System.Windows.Size) at System.Windows.UIElement.Measure(System.Windows.Size) at System.Windows.Controls.Grid.MeasureOverride(System.Windows.Size) at System.Windows.FrameworkElement.MeasureCore(System.Windows.Size) at System.Windows.UIElement.Measure(System.Windows.Size) at System.Windows.Controls.Control.MeasureOverride(System.Windows.Size) at System.Windows.FrameworkElement.MeasureCore(System.Windows.Size) at System.Windows.UIElement.Measure(System.Windows.Size) at System.Windows.Controls.Grid.MeasureCell(Int32, Boolean) at System.Windows.Controls.Grid.MeasureCellsGroup(Int32, System.Windows.Size, Boolean, Boolean, Boolean ByRef) at System.Windows.Controls.Grid.MeasureCellsGroup(Int32, System.Windows.Size, Boolean, Boolean) at System.Windows.Controls.Grid.MeasureOverride(System.Windows.Size) at System.Windows.FrameworkElement.MeasureCore(System.Windows.Size) at System.Windows.UIElement.Measure(System.Windows.Size) at MS.Internal.Helper.MeasureElementWithSingleChild(System.Windows.UIElement, System.Windows.Size) at System.Windows.Controls.ContentPresenter.MeasureOverride(System.Windows.Size) at System.Windows.FrameworkElement.MeasureCore(System.Windows.Size) at System.Windows.UIElement.Measure(System.Windows.Size) at System.Windows.Documents.AdornerDecorator.MeasureOverride(System.Windows.Size) at System.Windows.FrameworkElement.MeasureCore(System.Windows.Size) at System.Windows.UIElement.Measure(System.Windows.Size) at System.Windows.Controls.Grid.MeasureCell(Int32, Boolean) at System.Windows.Controls.Grid.MeasureCellsGroup(Int32, System.Windows.Size, Boolean, Boolean, Boolean ByRef) at System.Windows.Controls.Grid.MeasureCellsGroup(Int32, System.Windows.Size, Boolean, Boolean) at System.Windows.Controls.Grid.MeasureOverride(System.Windows.Size) at System.Windows.FrameworkElement.MeasureCore(System.Windows.Size) at System.Windows.UIElement.Measure(System.Windows.Size) at System.Windows.Controls.Grid.MeasureOverride(System.Windows.Size) at System.Windows.FrameworkElement.MeasureCore(System.Windows.Size) at System.Windows.UIElement.Measure(System.Windows.Size) at System.Windows.Window.MeasureOverrideHelper(System.Windows.Size) at System.Windows.Window.MeasureOverride(System.Windows.Size) at System.Windows.FrameworkElement.MeasureCore(System.Windows.Size) at System.Windows.UIElement.Measure(System.Windows.Size) at System.Windows.ContextLayoutManager.UpdateLayout() at System.Windows.UIElement.UpdateLayout() at System.Windows.Interop.HwndSource.SetLayoutSize() at System.Windows.Interop.HwndSource.set_RootVisualInternal(System.Windows.Media.Visual) at System.Windows.Interop.HwndSource.set_RootVisual(System.Windows.Media.Visual) at System.Windows.Window.SetRootVisual() at System.Windows.Window.SetRootVisualAndUpdateSTC() at System.Windows.Window.SetupInitialState(Double, Double, Double, Double) at System.Windows.Window.CreateSourceWindow(Boolean) at System.Windows.Window.CreateSourceWindowDuringShow() at System.Windows.Window.SafeCreateWindowDuringShow() at System.Windows.Window.ShowHelper(System.Object) at System.Windows.Window.Show() at System.Windows.Window.ShowDialog() at Telerik.Windows.Controls.InternalWindow.WindowWithNoChromeWindowHost.Open(Boolean) at Telerik.Windows.Controls.WindowBase.ShowWindow(Boolean) at MultiTool.App.OnDispatcherUnhandledException(System.Object, System.Windows.Threading.DispatcherUnhandledExceptionEventArgs) at System.Windows.Threading.Dispatcher.CatchException(System.Exception) at System.Windows.Threading.Dispatcher.CatchExceptionStatic(System.Object, System.Exception) at System.Windows.Threading.ExceptionWrapper.CatchException(System.Object, System.Exception, System.Delegate) 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)