匹配手机号

            //FileStream fs = new FileStream(@"C:UsersAlexDesktopTask.txt", FileMode.Open, FileAccess.Read);
            //StreamReader sr = new StreamReader(fs);

            #region "Read Content"
            StreamReader sr = new StreamReader(@"C:UsersAlexDesktopTask.txt", Encoding.GetEncoding("gb2312"));
            string content = sr.ReadToEnd();

            sr.Close();

            Console.WriteLine(content);

            Regex rx = new Regex(@"1[3-8]d{9}");
            MatchCollection matches = rx.Matches(content);
            Console.WriteLine(matches.Count);
            foreach (Match match in matches)
            {
                Console.WriteLine(match.Value);
            }
            Console.ReadKey();
            #endregion