验证手机号码是否合法

    /// <summary>
        /// 验证手机号码是否合法
        /// </summary>
        /// <param name="str_handset"></param>
        /// <returns></returns>
        private bool IsHandset(string str_handset)
        {
            return System.Text.RegularExpressions.Regex.IsMatch(str_handset, @"^1[3|4|5|7|8][0-9]\d{8}$");
        }