using System;

public class Program

{

    class Point{

        public Point(double x, double y){this.x = x; this.y=y;}

        public double x;

        public double y;

        public string ToString(){return x+","+y;}

    }

    public static void Main()

    {

​

        Point center = new Point(3,4);

        double rad=2;

        double rightY = center.y + rad;

        Point topRight = new Point(center.x + rad,center.y + rad);

        Point topLeft = new Point(center.x - rad,center.y + rad);

        Point bottomLeft = new Point(center.x - rad,center.y - rad);

        Point bottomRight = new Point(center.x + rad,center.y - rad);

        Console.WriteLine(topRight.ToString());

        Console.WriteLine(topLeft.ToString());

        Console.WriteLine(bottomLeft.ToString());

        Console.WriteLine(bottomRight.ToString());

    }

}