Windows XP 32与Windows 2008 64位的RegEx

Question

我有正则表达式适用于Windows XP（.NET 1.1），但不适用于Windows 2008 64（.NET 2.0）位平台。

thisLine=""fname","lname","empid","password","User","Teller","login","Active","title","Jan 11 2012 12:00AM","MA","Retail","East","Market St","email@email.com","denied","approved","denied","denied","manager@email.com""

你能告诉我为什么Windows XP 32位系统上的代码在Windows XP 32位上返回True而在Windows 2008 64位系统上返回false：

MsgBox(RegexObj.IsMatch(thisLine, ",(?!(?<=(?:^|,)\s*""(?:[^""]|""|\\"")*,)(?:[^""]|""|\\"")*""\s*(?:,|$))"))

Dim m As Match = RegexObj.Match(thisLine)
Return RegexObj.Split(thisLine)

这应该返回带有20元素的数组。再次，在XP上运行正常，为什么不在Windows 2008上运行？