AccessViolationException: 尝试读取或写入受保护的内存。这通常指示其他内存已损坏。
StackTrace:
   在 MS.Internal.TextFormatting.UnsafeNativeMethods.LoCreateLine(IntPtr ploc, Int32 cp, Int32 ccpLim, Int32 durColumn, UInt32 dwLineFlags, IntPtr pInputBreakRec, LsLInfo& plslinfo, IntPtr& pploline, Int32& maxDepth, LsLineWidths& lineWidths)
   在 System.Windows.Media.TextFormatting.TextFormatterContext.CreateLine(Int32 cpFirst, Int32 lineLength, Int32 maxWidth, LineFlags lineFlags, IntPtr previousLineBreakRecord, IntPtr& ploline, LsLInfo& plslineInfo, Int32& maxDepth, LsLineWidths& lineWidths)
   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 MS.Internal.Text.Line.Format(Int32 dcp, Double width, TextParagraphProperties lineProperties, TextLineBreak textLineBreak, TextRunCache textRunCache, Boolean showParagraphEllipsis)
   在 System.Windows.Controls.TextBlock.Format(Line line, Int32 length, Int32 dcp, Double wrappingWidth, TextParagraphProperties paragraphProperties, TextLineBreak textLineBreak, TextRunCache textRunCache, Boolean ellipsis)
   在 System.Windows.Controls.TextBlock.OnRender(DrawingContext ctx)
   在 System.Windows.UIElement.Arrange(Rect finalRect)
   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)