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

Posted by Robbie Baker
Robbie Baker
7,736 Points

Challenge Task 1 Help

I'm having some trouble understanding what they are asking for in this code. Can anyone explain better what it is that is being asked?

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

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

    class Square : Polygon
    {

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

1 Answer

Steven Parker
Steven Parker
229,644 Points
Steven Parker
Steven Parker
229,644 Points

You seem to have the right idea. Take a close look at Polygon and use it as an example. Things to look for:

  • it also has a public field and that field is defined outside of the constructor
  • it also takes a constructor parameter to initialize the field and the parameter's name is similar to the field
  • the field name starts with a capital letter and the parameter name starts with lower case
  • inside the constructor, the parameter is copied to the field

And when the instructions say, "Use base to initialize NumSides to 4", they mean that "4" literally: "base(4)".