private string [] telStarts = "134,135,136,137,138,139,150,151,152,157,158,159,130,131,132,155,156,133,153,180,181,182,183,185,186,176,187,188,189,177,178" .Split(',' );

/// <summary>
/// 随机生成电话号码
/// </summary>
/// <returns></returns>
public string getRandomTel()
{
    Random ran = new Random();
    int n = ran.Next(10, 1000);
    int index = ran.Next(0, telStarts.Length - 1);
    string first = telStarts[index];
    string second = (ran.Next(100, 888) + 10000).ToString().Substring(1);
    string thrid = (ran.Next(1, 9100) + 10000).ToString().Substring(1);
    return first + second + thrid;
}