using System;

using System.Collections.Generic;

​

public class Person {

    private string name;

    public string Name {

        get { return name; }

    }

    private int age;

    public int Age {

        get { return age; }

    }

    private Dictionary<string, int> history;

    public Person(string pName, int pAge) {

        name = pName;

        age = pAge;

        history = new Dictionary<string, int>();

    }

    public void AddPerson(string name, int time) {

        if (!history.ContainsKey(name))

            history.Add(name,time);

    }

    public void GetHistory(string name) {

        Console.WriteLine("Dating History of {0}",name);

        foreach (KeyValuePair<string,int> pair in history){

                Console.WriteLine("Partner = {0}, Time = {1}", pair.Key, pair.Value);

                }

            }

}

​

public class Program

{

    public static void Main()

    {

        Person s1 = new Person("John", 30);

        s1.AddPerson("Kary",1);

        s1.AddPerson("Sally",2);

​

        s1.GetHistory("John");

    }

}