using System;

using System.Collections.Generic;

​

public class Program

{   

    public static void Main()

    {

        Dictionary<string,Person> People = new Dictionary<string, Person>();

        People.Add("joe",new Person("blue","brown")) ; 

        int MyMethod(Dictionary<string,Person> dict)

        {

            return dict.Count;

        }

​

        int result = MyMethod(People);

        Console.WriteLine(result);

    }

}

​

public class Person

{

    public Person(string eyes, string hair)

    {

        Eyes = eyes;

        Hair = hair;

    }

    public string Eyes {get;set;}

    public string Hair {get;set;}

}

​