Прототип (Prototype)

using System;
using System.Threading;
using System.Linq;

class Program
{
   static void Main(string[] args)
   {
    IFigure rectangle = new Rectangle(10, 10);
    IFigure cloneRectangle = rectangle.Clone();
    Console.WriteLine("Прототип");
    rectangle.GetInfo();
    Console.WriteLine("Клон");
    cloneRectangle.GetInfo();

    IFigure circle = new Circle(50);
    IFigure cloneCircle = circle.Clone();
    Console.WriteLine("Круг");
    circle.GetInfo();
    Console.WriteLine("Клон");
    cloneCircle.GetInfo();

    Console.ReadLine();
   }
}

interface IFigure
{
    IFigure Clone();
    void GetInfo();
}

class Rectangle: IFigure
{
    int width;
    int height;

    public Rectangle(int w, int h)
    {
        this.width = w;
        this.height = h;
    }

    public IFigure Clone()
    {
        return new Rectangle(this.width, this.height);
    }

    public void GetInfo()
    {
        Console.WriteLine("Прямоугольник длиной {0} шириной {1}", this.height, this.width);
    }
}

class Circle: IFigure
{
    int radius;

    public Circle(int r)
    {
        this.radius = r;
    }

    public IFigure Clone()
    {
        return new Circle(this.radius);
    }

    public void GetInfo()
    {
        Console.WriteLine("Круг радиусом {0}", this.radius);
    }
}