Stuck in the virtual methods task.

namespace Treehouse.CodeChallenges
{
    class SequenceDetector
    {
        public virtual bool Scan(int[] sequence)
        {
            return true;
        }
    }
}

namespace Treehouse.CodeChallenges
{
    class RepeatDetector : SequenceDetector
    {
        public override bool Scan(int[] sequence)
        {
            bool IsThereRepeats;                //Variable that will be changed depending on input
            for(int i=0;i<sequence.Length;i++)  //loops through sequence array
            {
                if(sequence[i]==sequence[i++])   // checks if for instance sequence[1] number is the same as sequence[2] number
                {
                    IsThereRepeats = true;      //if it is then IsThereRepeats = true; so there is a repeat
                }
                else
                {
                    IsThereRepeats = false;     //otherwise it returns false;no repeats
                }
            }
            return IsThereRepeats;     //finally returns the boolean value
        }
    }
}