利用二维数组制作通讯录，通讯录中保存姓名，电话，qq等信息，通过姓名查找对应的通讯信息。输入需要查找的姓名，输出相应的姓名，电话，qq等。其中，查找过程写在search（）方法中，在控制台下完成。

 static void Main(string[] args)
        {
            //初始数据
            string[,] addressBook = new string[,] { { "A,110,QQ" }, { "B,120,qq" } };

            //查询
            string[] address = Search(addressBook, "A").Split(',');

            string name = address.Length >= 3 ? address[0] : null;
            string tell = address.Length >= 3 ? address[1] : null;
            string qq = address.Length >= 3 ? address[2] : null;

        }
       
        private static string Search(string[,] addressBook, string name)
        {
            string str = string.Empty;
            foreach (string address in addressBook)
            {
                str = address.Contains(name) ? address : str;
            }
            return str;
        }