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C# C# Objects Encapsulation with Properties Computed Properties

Posted by Jesse Bates
Jesse Bates
856 Points

How is this readonly?

This is nowhere near finished, but I wanted to understand why I'm getting an error message that says "square.sideLength is read-only" when there isn't anything that's got readonly in it?

Square.cs 
namespace Treehouse.CodeChallenges
{
    class Square : Polygon
    {
        public double SideLength 
        {
            get
            {

            }
        }

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

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