using System;

using System.Collections.Generic;

​

public class Program

{

    public class Person{

        private string NAME;

        public string name{

            set{NAME = value;}

            get{return NAME;}

        }

​

        private int AGE;

        public int age{

            set{AGE = value;}

            get{return AGE;}

        }

​

        private string GENDER;

        public string gender{

            set{GENDER = value;}

            get{return GENDER;}

        }

​

        private string DATEDPERSON;

        public string datedperson{

            set{DATEDPERSON = value;}

            get{return DATEDPERSON;}

        }

        private int MONTH;

        public int month{

            set{MONTH = value;} 

            get{return MONTH;}

        }

​

        }

        public  static string Display(List<Person> Someone){

            return "av";

        }

        public static void Adddatedperson(List <Person> someone,string anotherperson,int period){

                if(period >= 0){

                someone.Add(new Person{datedperson=anotherperson,month=period});

                    Console.WriteLine("{0} has been added successfully!!",anotherperson);

                }

                else

                Console.WriteLine("The time spent is not reasonable");

    }

    public static void Main()

    {

        List <Person> Peter = new List<Person>();

        Peter.Add(new Person{name="Peter",age=20,gender="M"});

        Display(Peter);

        Adddatedperson(Peter,"Mary",6);

    }

}

​