Prototype-pattern_2.cs

class Program
    {
        static void Main(string[] args)
        {
            Console.InputEncoding = Encoding.UTF8;
            Console.OutputEncoding = Encoding.UTF8;

            Uyen uyen = new Uyen("Uyên", "Em ăn cơm chưa", "Anh ăn cơm rồi");
            Console.WriteLine($"{uyen.name}, {uyen.say}, {uyen.response}");

            Uyen cloneOfUyen = (Uyen)uyen.Clone();
            cloneOfUyen.say = "Anh ghét em lắm";

            Console.WriteLine($"{cloneOfUyen.name}, {cloneOfUyen.say}, {cloneOfUyen.response}");
            Console.WriteLine($"{uyen.name}, {uyen.say}, {uyen.response}");
            Console.ReadLine();
        }
    }