I'm sorry my teacher actually wants it in C# form.

Create an application named ShapesDemo that creates several objects that descend from an abstract class called GeometricFigure. Each GeometricFigure includes a height, a width, and an area. Provide get and set accessors for each field except ComputeArea that computes the area of the GeometricFigure. Create three . A Rectangle is a GeometricFigure whose area is determined by multiplying . A Square is a Rectangle in which the width and height are the same. Provide a area; the area is computed and is read-only. Include an abstract method called additional classes: width by height. constructor that accepts both height and width, forcing them to be equal if they are not. Provide a second constructor that accepts just one dimension and uses it for both height and width. The Square class uses the Rectangle's ComputeArea() method A Triangle is a GeometricFigure whose area is determined by multiplying the width by half the height. In the ShapesDemo class, after each object is created, pass it to a method that accepts a GeometricFigure argument in which the figure's data is displayed. Change some dimensions of some of the figures, and pass each to the display method aga in