C# 常用的正则式

1、获取指定两个字符中间的字符

public static string MidStrEx_New(string sourse, string startstr, string endstr)
        {
            Regex rg = new Regex("(?<=(" + startstr + "))[.\\s\\S]*?(?=(" + endstr + "))", RegexOptions.Multiline | RegexOptions.Singleline);
            return rg.Match(sourse).Value;
        }