using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace RegexEx
{
    class Program
    {
        static void Main(string[] args)
        {
            string str = "Fax张楚晋";
            string temp = System.Text.RegularExpressions.Regex.Replace(str, "[a-zA-Z]", "").ToString();
            Console.Write("替换字母后的字符:{0}\n",temp);
            System.Text.RegularExpressions.Match m = System.Text.RegularExpressions.Regex.Match(str, @"(?<text>(^[a-zA-Z]+))", System.Text.RegularExpressions.RegexOptions.IgnoreCase);
            if (m.Success)
            {
                string s = m.Groups["text"].Value.ToString();
                Console.Write(s);
            }
            Console.Read();
        }
    }
}