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C# C# Objects Encapsulation with Properties Expression Bodied Members

Syntactic Sugar

I'm struggling through this course, I've never done anything like this so please be kind, it's been a fight to get to here. What am I misunderstanding or not grasping? Re-watching the videos now.

Link: https://teamtreehouse.com/community/cant-solve-challenge-1-of-2

Question: Use the syntactic sugar just learned about to convert the Area property to a single line property.

Given Code: namespace Treehouse.CodeChallenges { class Square : Polygon { public double SideLength { get; private set; }

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

    public Square(double sideLength) : base(4)
    {
        SideLength = sideLength;
    }

    public void Scale(double factor)
    {
        SideLength *= factor;
    }
}

}

My wrong answer, rather one variable of it: namespace Treehouse.CodeChallenges { class Polygon { public double Area => SideLength * SideLength; } }

Square.cs
namespace Treehouse.CodeChallenges
{
    class Polygon
    {
        public double Area => SideLength * SideLength;
    }
}
Polygon.cs
namespace Treehouse.CodeChallenges
{
    class Polygon
    {
        public int NumSides { get; private set; }

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

1 Answer

Steven Parker
Steven Parker
231,084 Points

Your single-line version of Area looks good. :+1:

But what happened to the other methods and properties of Square? They all seem to be missing. And the class declaration itself has changed!

Start the challenge over, and be careful to change only what the instructions ask for. Leave the other code as it is!