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C# Intermediate C# Polymorphism Virtual Properties

Posted by Hamilton Mtungwazi
Hamilton Mtungwazi
1,868 Points

SequenceDetector now contains a Description property. In RepeatDetector, override the Description property to return

i cant seem to be able to compile,help someone please!

RepeatDetector.cs 
namespace Treehouse.CodeChallenges
{
    class RepeatDetector : SequenceDetector
    {
        public override string DescriptIon => "Detects Repetitions";

        public override bool Scan(int[] sequence)
        {
            if(sequence.Length < 2)
            {
                return false;
            }

            for(int i = 1; i < sequence.Length; ++i)
            {
                if(sequence[i] == sequence[i-1])
                {
                    return true;
                }
            }

            return false;
        }
    }
}
SequenceDetector.cs 
namespace Treehouse.CodeChallenges
{
    class SequenceDetector
    {
        public virtual string Description => "";

        public virtual bool Scan(int[] sequence)
        {
            return true;
        }
    }
}
Steven Parker
Steven Parker
231,275 Points
Steven Parker
Steven Parker
231,275 Points

That's the "arrow" operator, which is a shorthand notation for creating an expression-bodied property.

For more details, the the MSDN page.

1 Answer

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

You just have a couple of spelling issues:

  • you wrote "DescriptIon" (with capital "I") instead of "DescriptIon" (lower case "i")
  • you wrote "Repetitions" (capital "R") instead of "repetitions" (lower case "r")