C#：构造函数

以下为含参和不含参的构造方法的例子

代码：

class Program
    {
//*******************Part One Begin*******************************//
        public string Name;
        public int Age;

        public Program()
        {
            this.Name = "";
            this.Age = 0;
        }

        public Program(string name)
        {
            this.Name = name;
            this.Age = 0;
        }
        public override string ToString()
        {
            return
            (
                String.Format("My Name is {0}，I am {1} years old", Name, Age)
            );
        }
//*******************Part One End*******************************//
//如果分几个类写，第二部分继承第一部分//
//*******************Part Two Begin*******************************//

        public static Program Pp1(string aa="",int age=0)
        {
            Program program = new Program(aa){ Name = aa, Age = age};
            return program;

        }

        public static Program PpProgram2(string aa = "", int age = 0)
        {
            Program program = new Program {Age = age, Name = aa};
            return program;
        }
//*******************Part Two End*******************************//
//*******************Part Three Begin*******************************//
        static void Main(string[] args)
        {
            Program p1 = new Program();
            Program p2 = new Program("zhangsan");
            var aa = Program.Pp1("mary", 10);
            var bb = Program.PpProgram2("lisa", 18);
            Console.WriteLine("{0}", p1);
            Console.WriteLine("{0}", p2);
            Console.WriteLine("{0}", aa);
            Console.WriteLine("{0}", bb);

            Console.ReadKey();
        }
//*******************Part Three End*******************************//
    }

 运行结果：