Question

My class Ellipse should inherit from my class Shape but I get this error message:

Error 1 ‘ConsoleApplication3.Ellipse’ does not implement inherited abstract member ‘ConsoleApplication3.Shape.Perimeter.get’

I also get the error message that I’m hiding Area, a property in Ellipse.

Can anyone help me please?

My shape class looks like this:

public abstract class Shape
{
    //Protected constructor
    protected Shape(double length, double width)
    {
        _length = length;
        _width = width;
    }


    private double _length;
    private double _width;

    public abstract double Area
    {
        get;
    }

And my ellipse class is:

class Ellipse : Shape
{
    //Constructor
    public Ellipse(double length, double width)
        :base(length, width)
    {

    }

    //Egenskaper
    public override double Area
    {
        get
        {
            return Math.PI * Length * Width;
        }
    }
}

Answer 1

You need to use the override modifier on the Area and Perimeter properties in your Ellipse class, e.g.

public override double Area { get; }

public override double Perimeter { get; }

A tip for you in Visual Studio, put the cursor inside the text ‘Shape’ (in your ellipse class) and press Ctrl + .. This should add stubs for members you haven’t implemented