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 Encapsulation with Properties Computed Properties

How to solve this

A little confused here

Square.cs
namespace Treehouse.CodeChallenges
{
    class Square : Polygon
    {
        public double SideLength { get; private set; }
        private double area=0;

        public Square(double sideLength) : base(4)
        {
            SideLength = sideLength;
        }
      public void Area()
      {
        area = SideLength * SideLength;
      }
    }
}
Polygon.cs
namespace Treehouse.CodeChallenges
{
    public class Polygon
    {
        public int NumSides { get; private set; }

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

2 Answers

Steven Parker
Steven Parker
231,248 Points

:point_right: Here's a few hints that may help:

  • The challenge asked for a computed property, but it looks like you were defining a method.
  • A property will not have parentheses following its name like a method does.
  • The code for a computed property will be contained within a get block.
  • "Void" means "does not return anything". Your property will need to return a value of the appropriate type.
  • Whatever a property or method returns will be in a return statement.

I'm betting you can handle it now without an explicit spoiler.

public double Area { get { return SideLength*SideLength; } }