HashMain

 class Program
    {
        static void Main(string[] args)
        {
            Student st1 = new Student("Petkan", 20);
            Student st2 = new Student("Dragan", 30);
            Student st3 = new Student("Petkan", 20);
            Student st4 = st1;

            Console.WriteLine(st1.GetHashCode());
            Console.WriteLine(st2.GetHashCode());
            Console.WriteLine(st3.GetHashCode());
            Console.WriteLine(st4.GetHashCode());

            Console.WriteLine(st1.Equals(st2));
            Console.WriteLine(st1.Equals(st3));
            Console.WriteLine(st1.Equals(st4));

            HashSetMy<int> hs = new HashSetMy<int>();
            hs.AddItem(10);
            hs.AddItem(20);
            hs.AddItem(30);
            hs.AddItem(40);
            hs.AddItem(50);
            hs.AddItem(50);
            hs.AddItem(60);
            hs.Remove(30);
            Console.WriteLine(string.Join(" ", hs));


        }
    }