NullReferenceException at System.Windows.Controls.Primitives.Popup.OnWindowResize(Object sender, AutoResizedEventArgs e) at System.Windows.Interop.HwndSource.Resize(Size newSize) at System.Windows.Interop.HwndSource.OnLayoutUpdated(Object obj, EventArgs args) at System.Windows.ContextLayoutManager.fireLayoutUpdateEvent() at System.Windows.ContextLayoutManager.UpdateLayout() at System.Windows.ContextLayoutManager.UpdateLayoutCallback(Object arg) at System.Windows.Media.MediaContext.FireInvokeOnRenderCallbacks() at System.Windows.Media.MediaContext.RenderMessageHandlerCore(Object resizedCompositionTarget) at System.Windows.Media.MediaContext.RenderMessageHandler(Object resizedCompositionTarget) at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs) at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler) FileNotFoundException Unable to find the specified file. at MS.Internal.TextFormatting.TextMetrics.FullTextLine.FormatLine(FullTextState fullText, Int32 cpFirst, Int32 lineLength, Int32 formatWidth, Int32 finiteFormatWidth, Int32 paragraphWidth, LineFlags lineFlags, FormattedTextSymbols collapsingSymbol) at MS.Internal.TextFormatting.TextMetrics.FullTextLine..ctor(FormatSettings settings, Int32 cpFirst, Int32 lineLength, Int32 paragraphWidth, LineFlags lineFlags) at MS.Internal.TextFormatting.TextFormatterImp.FormatLineInternal(TextSource textSource, Int32 firstCharIndex, Int32 lineLength, Double paragraphWidth, TextParagraphProperties paragraphProperties, TextLineBreak previousLineBreak, TextRunCache textRunCache) at MS.Internal.TextFormatting.TextFormatterImp.FormatLine(TextSource textSource, Int32 firstCharIndex, Double paragraphWidth, TextParagraphProperties paragraphProperties, TextLineBreak previousLineBreak, TextRunCache textRunCache) at System.Windows.Controls.TextBlock.MeasureOverride(Size constraint) at System.Windows.FrameworkElement.MeasureCore(Size availableSize) at System.Windows.UIElement.Measure(Size availableSize) at MS.Internal.Helper.MeasureElementWithSingleChild(UIElement element, Size constraint) at System.Windows.Controls.ContentPresenter.MeasureOverride(Size constraint) at System.Windows.FrameworkElement.MeasureCore(Size availableSize) at System.Windows.UIElement.Measure(Size availableSize) at System.Windows.Controls.Border.MeasureOverride(Size constraint) at System.Windows.FrameworkElement.MeasureCore(Size availableSize) at System.Windows.UIElement.Measure(Size availableSize) at System.Windows.Controls.Control.MeasureOverride(Size constraint) at System.Windows.FrameworkElement.MeasureCore(Size availableSize) at System.Windows.UIElement.Measure(Size availableSize) at System.Windows.Documents.AdornerDecorator.MeasureOverride(Size constraint) at System.Windows.FrameworkElement.MeasureCore(Size availableSize) at System.Windows.UIElement.Measure(Size availableSize) at System.Windows.Controls.Decorator.MeasureOverride(Size constraint) at System.Windows.FrameworkElement.MeasureCore(Size availableSize) at System.Windows.UIElement.Measure(Size availableSize) at System.Windows.Controls.Primitives.PopupRoot.MeasureOverride(Size constraint) at System.Windows.FrameworkElement.MeasureCore(Size availableSize) at System.Windows.UIElement.Measure(Size availableSize) at System.Windows.Interop.HwndSource.SetLayoutSize() at System.Windows.Interop.HwndSource.set_RootVisualInternal(Visual value) at System.Windows.Controls.Primitives.Popup.SetRootVisualToPopupRoot() at System.Windows.Controls.Primitives.Popup.CreateWindow(Boolean asyncCall) at System.Windows.Controls.Primitives.Popup.OnIsOpenChanged(DependencyObject d, DependencyPropertyChangedEventArgs e) at System.Windows.DependencyObject.OnPropertyChanged(DependencyPropertyChangedEventArgs e) at System.Windows.FrameworkElement.OnPropertyChanged(DependencyPropertyChangedEventArgs e) at System.Windows.DependencyObject.NotifyPropertyChange(DependencyPropertyChangedEventArgs args) at System.Windows.DependencyObject.UpdateEffectiveValue(EntryIndex entryIndex, DependencyProperty dp, PropertyMetadata metadata, EffectiveValueEntry oldEntry, EffectiveValueEntry& newEntry, Boolean coerceWithDeferredReference, Boolean coerceWithCurrentValue, OperationType operationType) at System.Windows.DependencyObject.SetValueCommon(DependencyProperty dp, Object value, PropertyMetadata metadata, Boolean coerceWithDeferredReference, Boolean coerceWithCurrentValue, OperationType operationType, Boolean isInternal) at System.Windows.Data.BindingOperations.SetBinding(DependencyObject target, DependencyProperty dp, BindingBase binding) at System.Windows.Controls.Primitives.Popup.CreateRootPopupInternal(Popup popup, UIElement child, Boolean bindTreatMousePlacementAsBottomProperty) at System.Windows.Controls.ToolTip.OnIsOpenChanged(DependencyObject d, DependencyPropertyChangedEventArgs e) at System.Windows.DependencyObject.OnPropertyChanged(DependencyPropertyChangedEventArgs e) at System.Windows.FrameworkElement.OnPropertyChanged(DependencyPropertyChangedEventArgs e) at System.Windows.DependencyObject.NotifyPropertyChange(DependencyPropertyChangedEventArgs args) at System.Windows.DependencyObject.UpdateEffectiveValue(EntryIndex entryIndex, DependencyProperty dp, PropertyMetadata metadata, EffectiveValueEntry oldEntry, EffectiveValueEntry& newEntry, Boolean coerceWithDeferredReference, Boolean coerceWithCurrentValue, OperationType operationType) at System.Windows.DependencyObject.SetValueCommon(DependencyProperty dp, Object value, PropertyMetadata metadata, Boolean coerceWithDeferredReference, Boolean coerceWithCurrentValue, OperationType operationType, Boolean isInternal) at System.Windows.DependencyObject.SetValue(DependencyProperty dp, Object value) at System.Windows.Controls.PopupControlService.RaiseToolTipOpeningEvent(Boolean fromKeyboard) at System.Windows.Controls.PopupControlService.InspectElementForToolTip(DependencyObject o, ToolTipTrigger triggerAction) at System.Windows.Controls.PopupControlService.OnMouseMove(IInputElement directlyOver, Point pt) at System.Windows.Controls.PopupControlService.OnPostProcessInput(Object sender, ProcessInputEventArgs e) at System.Windows.Input.InputManager.RaiseProcessInputEventHandlers(ProcessInputEventHandler postProcessInput, ProcessInputEventArgs processInputEventArgs) at System.Windows.Input.InputManager.ProcessStagingArea() at System.Windows.Input.InputManager.ProcessInput(InputEventArgs input) at System.Windows.Input.InputProviderSite.ReportInput(InputReport inputReport) at System.Windows.Interop.HwndMouseInputProvider.ReportInput(IntPtr hwnd, InputMode mode, Int32 timestamp, RawMouseActions actions, Int32 x, Int32 y, Int32 wheel) at System.Windows.Interop.HwndMouseInputProvider.FilterMessage(IntPtr hwnd, WindowMessage msg, IntPtr wParam, IntPtr lParam, Boolean& handled) at System.Windows.Interop.HwndSource.InputFilterMessage(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled) at MS.Win32.HwndWrapper.WndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled) at MS.Win32.HwndSubclass.DispatcherCallbackOperation(Object o) at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs) at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler) FileNotFoundException Unable to find the specified file. at MS.Internal.Text.TextInterface.Native.Util.ConvertHresultToException(Int32 hr) at MS.Internal.Text.TextInterface.FontList.get_Item(UInt32 A_0) at MS.Internal.FontFace.PhysicalFontFamily.MapGlyphTypeface(FontStyle style, FontWeight weight, FontStretch stretch, CharacterBufferRange charString, CultureInfo digitCulture, Int32& advance, Int32& nextValid) at MS.Internal.Shaping.TypefaceMap.MapByFontFaceFamily(CharacterBufferRange unicodeString, CultureInfo culture, CultureInfo digitCulture, IFontFamily fontFamily, FontStyle canonicalStyle, FontWeight canonicalWeight, FontStretch canonicalStretch, PhysicalFontFamily& firstValidFamily, Int32& firstValidLength, IDeviceFont deviceFont, Boolean nullFont, Double scaleInEm, SpanVector scaledTypefaceSpans, Int32 firstCharIndex, Boolean ignoreMissing, Int32& nextValid) at MS.Internal.Shaping.TypefaceMap.MapByFontFamily(CharacterBufferRange unicodeString, CultureInfo culture, CultureInfo digitCulture, IFontFamily fontFamily, CanonicalFontFamilyReference canonicalFamilyReference, FontStyle canonicalStyle, FontWeight canonicalWeight, FontStretch canonicalStretch, PhysicalFontFamily& firstValidFamily, Int32& firstValidLength, IDeviceFont deviceFont, Double scaleInEm, Int32 recursionDepth, SpanVector scaledTypefaceSpans, Int32 firstCharIndex, Int32& nextValid) at MS.Internal.Shaping.TypefaceMap.MapOnceByFontFamilyList(CharacterBufferRange unicodeString, CultureInfo culture, CultureInfo digitCulture, FontFamily[] familyList, PhysicalFontFamily& firstValidFamily, Int32& firstValidLength, IDeviceFont deviceFont, Double scaleInEm, Int32 recursionDepth, SpanVector scaledTypefaceSpans, Int32 firstCharIndex, Int32& nextValid) at MS.Internal.Shaping.TypefaceMap.MapByFontFamilyList(CharacterBufferRange unicodeString, CultureInfo culture, CultureInfo digitCulture, FontFamily[] familyList, PhysicalFontFamily& firstValidFamily, Int32& firstValidLength, IDeviceFont deviceFont, Double scaleInEm, Int32 recursionDepth, SpanVector scaledTypefaceSpans, Int32 firstCharIndex, Int32& nextValid) at MS.Internal.Shaping.TypefaceMap.MapItem(CharacterBufferRange unicodeString, CultureInfo culture, Span itemSpan, SpanVector`1& cachedScaledTypefaceIndexSpans, Int32 ichItem) at MS.Internal.Shaping.TypefaceMap.GetShapeableText(CharacterBufferReference characterBufferReference, Int32 stringLength, TextRunProperties textRunProperties, CultureInfo digitCulture, Boolean isRightToLeftParagraph, IList`1 shapeableList, IShapeableTextCollector collector, TextFormattingMode textFormattingMode) at MS.Internal.Shaping.GlyphingCache.GetShapeableText(Typeface typeface, CharacterBufferReference characterBufferReference, Int32 stringLength, TextRunProperties textRunProperties, CultureInfo digitCulture, Boolean isRightToLeftParagraph, IList`1 shapeableList, IShapeableTextCollector collector, TextFormattingMode textFormattingMode) at System.Windows.Media.TextFormatting.TextCharacters.MS.Internal.TextFormatting.ITextSymbols.GetTextShapeableSymbols(GlyphingCache glyphingCache, CharacterBufferReference characterBufferReference, Int32 length, Boolean rightToLeft, Boolean isRightToLeftParagraph, CultureInfo digitCulture, TextModifierScope textModifierScope, TextFormattingMode textFormattingMode, Boolean isSideways) at MS.Internal.TextFormatting.TextStore.CreateTextLSRuns(TextRunInfo runInfo, IList`1 textEffects, CultureInfo digitCulture, Int32 offsetToFirstChar, Int32 stringLength, Int32 uniformBidiLevel, TextFormattingMode textFormattingMode, Boolean isSideways, Int32& lastBidiLevel) at MS.Internal.TextFormatting.TextStore.CreateLSRuns(TextRunInfo runInfo, IList`1 textEffects, CultureInfo digitCulture, Int32 offsetToFirstChar, Int32 stringLength, Int32 uniformBidiLevel, TextFormattingMode textFormattingMode, Boolean isSideways, Int32& lastBidiLevel, Int32& textRunLength) at MS.Internal.TextFormatting.TextStore.CreateLSRunsUniformBidiLevel(SpanVector runInfoVector, SpanVector textEffectsVector, Int32 runInfoFirstCp, Int32 ichUniform, Int32 cchUniform, Int32 uniformBidiLevel, TextFormattingMode textFormattingMode, Boolean isSideways, Int32& lastBidiLevel) at MS.Internal.TextFormatting.TextStore.FetchLSRun(Int32 lscpFetch, TextFormattingMode textFormattingMode, Boolean isSideways, Plsrun& plsrun, Int32& lsrunOffset, Int32& lsrunLength) at MS.Internal.TextFormatting.LineServicesCallbacks.FetchRunRedefined(IntPtr pols, Int32 lscpFetch, Int32 fIsStyle, IntPtr pstyle, Char* pwchTextBuffer, Int32 cchTextBuffer, Int32& fIsBufferUsed, Char*& pwchText, Int32& cchText, Int32& fIsHidden, LsChp& lschp, IntPtr& lsplsrun)