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.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)