private bool IsValidUser(Client user) { return false; }
public static void Main() { Client xiaoWang = new Client(); xiaoWang.Name = null; Console.WriteLine(xiaoWang.Name); Console.Read(); //xiaoWang.name = "Xiao Wang"; //xiaoWang.age = 27; //xiaoWang.password = "******" //xiaoWang.age = 1000; //xiaoWang.password = "******"; }