随机生成验证码

static void Main(string[] args)
{
while (true)
{
string sj = "abcdefghijklmnopqrstuvwxyz";
string sj1 = "啊爱的额发人个额而非果然他额额额图腾";
Random r=new Random();
string s1=sj.Substring(r.Next(0,26),1);
s1+=sj1.Substring(r.Next(0,sj1.Length),1);
s1+=sj.Substring(r.Next(0,26),1);
s1+=sj1.Substring(r.Next(0, sj1.Length),1);
Console.WriteLine(s1);
Console.ReadLine();
}

}

随机生成验证码

原文：http://www.cnblogs.com/dlexia/p/4389062.html