COMException
   在 MS.Internal.TextFormatting.TextMetrics.FullTextLine.FormatLine(FullTextState fullText, Int32 cpFirst, Int32 lineLength, Int32 formatWidth, Int32 finiteFormatWidth, Int32 paragraphWidth, LineFlags lineFlags, FormattedTextSymbols collapsingSymbol)
   在 MS.Internal.TextFormatting.TextMetrics.FullTextLine..ctor(FormatSettings settings, Int32 cpFirst, Int32 lineLength, Int32 paragraphWidth, LineFlags lineFlags)
   在 MS.Internal.TextFormatting.TextFormatterImp.FormatLineInternal(TextSource textSource, Int32 firstCharIndex, Int32 lineLength, Double paragraphWidth, TextParagraphProperties paragraphProperties, TextLineBreak previousLineBreak, TextRunCache textRunCache)
   在 MS.Internal.TextFormatting.TextFormatterImp.FormatLine(TextSource textSource, Int32 firstCharIndex, Double paragraphWidth, TextParagraphProperties paragraphProperties, TextLineBreak previousLineBreak, TextRunCache textRunCache)
   在 System.Windows.Controls.TextBlock.MeasureOverride(Size constraint)
   在 System.Windows.FrameworkElement.MeasureCore(Size availableSize)
   在 System.Windows.UIElement.Measure(Size availableSize)
   在 System.Windows.ContextLayoutManager.UpdateLayout()
   在 System.Windows.ContextLayoutManager.UpdateLayoutCallback(Object arg)
   在 System.Windows.Media.MediaContext.FireInvokeOnRenderCallbacks()
   在 System.Windows.Media.MediaContext.RenderMessageHandlerCore(Object resizedCompositionTarget)
   在 System.Windows.Media.MediaContext.RenderMessageHandler(Object resizedCompositionTarget)
   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)

COMException
灾难性故障 (异常来自 HRESULT:0x8000FFFF (E_UNEXPECTED))
   在 System.Runtime.InteropServices.Marshal.ThrowExceptionForHRInternal(Int32 errorCode, IntPtr errorInfo)
   在 System.Runtime.InteropServices.Marshal.ThrowExceptionForHR(Int32 errorCode, IntPtr errorInfo)
   在 MS.Internal.Text.TextInterface.Native.Util.ConvertHresultToException(Int32 hr)
   在 MS.Internal.Text.TextInterface.TextAnalyzer.GetGlyphs(UInt16* textString, UInt32 textLength, Font font, UInt16 blankGlyphIndex, Boolean isSideways, Boolean isRightToLeft, CultureInfo cultureInfo, DWriteFontFeature[][] features, UInt32[] featureRangeLengths, UInt32 maxGlyphCount, TextFormattingMode textFormattingMode, ItemProps itemProps, UInt16* clusterMap, UInt16* textProps, UInt16* glyphIndices, UInt32* glyphProps, Int32* pfCanGlyphAlone, UInt32& actualGlyphCount)
   在 MS.Internal.TextFormatting.LineServicesCallbacks.GetGlyphsRedefined(IntPtr pols, IntPtr* plsplsruns, Int32* pcchPlsrun, Int32 plsrunCount, Char* pwchText, Int32 cchText, LsTFlow textFlow, UInt16* puGlyphsBuffer, UInt32* piGlyphPropsBuffer, Int32 cgiGlyphBuffers, Int32& fIsGlyphBuffersUsed, UInt16* puClusterMap, UInt16* puCharProperties, Int32* pfCanGlyphAlone, Int32& glyphCount)