classes and objects

using System;

namespace TestOOP
{
    class Bird
    {
        private string name;
        private string color;
        private int old;
        ........................
        .......................
        int function1()
        {
            ..............
            return ....;
        }
    }
    class Program
    {
        static void Main(string[] args)
        {
            Bird bird1 = new Bird()
            Bird bird2 = new Bird()
            ......................
            ......................
        }
    }
}