Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

C# C# Objects Inheritance Inheritance

Matthew Benham
Matthew Benham
823 Points

Defining Square as inner class of Polygon

Where did I go wrong here?

Polygon.cs
namespace Treehouse.CodeChallenges
{
    class Polygon
    {
        public readonly int NumSides;

        public Polygon(int numSides)
        {
            NumSides = numSides;
            numSides = 4;
        }
    }

    class Square : Polygon
    {
        public readonly int SideLength;

        public Square(int sideLength) : base(numSides)
        {
            SideLength = sideLength;
        }
    }
}

1 Answer

Steven Parker
Steven Parker
231,271 Points

The constructor for Square has no parameter named numSides.

But you do want to pass the number of sides to the base constructor. So instead of "base(numSides)", you might write "base(4)".