namespace TestEqual

{

    class Program

    {

        static void Main(string[] args)

        {

            Point2D a = new Point2D

            {

                X = ,

                Y =

            };

            Point2D b = a;

            CallEquals(a, b);

            a.Equals(b);

        }

        public static void CallEquals<T>(T instance, T other)

        {

            instance.Equals(other);

        }

    }

    public struct Point2D

    {

        public int X;

        public int Y;

        public override bool Equals(object obj)

        {

            if (!(obj is Point2D)) return false;

            Point2D other = (Point2D) obj;

            return X == other.X && Y == other.Y;

        }

        public bool Equals(Point2D other)

        {

            return X == other.X && Y == other.Y;

        }

    }

}