generic class example C#

Program.cs

namespace GenericClassExample
{
    class Point<T>
    {
        T x; // поле типу T
        T y;

        public T X // властивість типу T
        {
            get { return x; }
            set { x = value; }
        }
        
        public T Y
        {
            get { return y; }
            set { y = value; }
        }

        public Point(T x, T y) // аргументи типу T
        {
            this.x = x;
            this.y = y;
        }
        
        public Point()
        {
            x = default(T);
            y = default(T);
            // default(Int32) - 0
            // default(Boolean) - false
            // default(String) - ""
        }
    }

    class Program
    {
        static void Main()
        {
            var a = new Point<int>(10, 20);
            Console.WriteLine("x = {0}, y = {1}", a.X, a.Y);

            var c = new Point<double>(10.5, 20.5);
            Console.WriteLine("x = {0}, y = {1}", c.X, c.Y);

            var d = new Point<string>("десять", "двадцять"); // where T : struct
            Console.WriteLine("x = {0}, y = {1}\n", d.X, d.Y);

            // http://stackoverflow.com/questions/6584263/whats-the-meaning-of-apostrophe-number-in-the-object-type-of-properties-wit

            Console.WriteLine(typeof(Point<int>));
            Console.WriteLine(typeof(Point<double>));
            Console.WriteLine(typeof(Point<string>));
            Console.WriteLine();
        }
    }
}