.net 正则表达式验证email

        public static bool IsEmail(string str_Email)
        {
            return System.Text.RegularExpressions.Regex.IsMatch(str_Email, @"^([\w-\.]+)@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.)|(([\w-]+\.)+))([a-zA-Z]{2,4}|[0-9]{1,3})(\]?)$");

        }

        验证字符串只出现字母，数字和-

        private bool CheckMacFormat(string mac)
        {
            return System.Text.RegularExpressions.Regex.IsMatch(mac, @"^[A-Za-z0-9\-]+$");
        }