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 Expression Bodied Members

Posted by Alexisca hall
Alexisca hall
23,683 Points

Use the syntactic sugar just learned about to convert the Scale method to a single line method.

Use the syntactic sugar just learned about to convert the Scale method to a single line method.

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

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

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

3 Answers

Ashenafi Ashebo
Ashenafi Ashebo
15,021 Points
Ashenafi Ashebo
Ashenafi Ashebo
15,021 Points

I do like this but it didn't compile. namespace Treehouse.CodeChallenges { class Square : Polygon { public double SideLength { get; private set;} 

    public double Area => SideLength * SideLength;


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


    public void Scale(double factor) => SideLength *= factor;

}

}

namespace Treehouse.CodeChallenges { class Polygon { public int NumSides { get; private set; }

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

}

Steven Parker
Steven Parker
231,275 Points
Steven Parker
Steven Parker
231,275 Points

You did too much this time.

The challenge does not ask you to change the Square constructor.

Steven Parker
Steven Parker
231,275 Points
Steven Parker
Steven Parker
231,275 Points

Your Scale method seems to be missing entirely from the code above.

You might need to start the challenge over to get it back. But since you've already passed task 1, it shouldn't be too hard. The changes you need to make are very similar to the ones you made to convert the Area property into a single line in the previous task.