AlphabetCheckers.ActualChain.RemoveCharacter C# (CSharp) Method

        public void RemoveCharacter(int length)
        {
            if (Source.GetLength() == length)
            {
                resultChain.Set(Source, actualLength);
                Source = null;
            }
            else
            {
                var it1 = new IteratorStart(Source, length, 1);
                it1.Next();
                resultChain.Set(it1.Current(), actualLength);
                var it2 = new IteratorEnd(Source, Source.GetLength() - length, 1);
                it2.Next();
                Source = (BaseChain)it2.Current();
            }

            actualLength++;
        }