正则/p

\p{Lu} or \p{Uppercase_Letter}: an uppercase letter that has a lowercase variant.
https://blog.csdn.net/wushuai1346/article/details/7206749
http://www.runoob.com/csharp/csharp-regular-expressions.html
https://blog.csdn.net/lampqiu/article/details/47317951

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