InsertAt

public void InsertAt(object item, int index)
        {
            if (!IsEmpty())
            {
                Node newNode = new Node(item, null);

                if (index == 0) // if index is head
                {
                    newNode.Next = head;
                    head = newNode;
                }
                else if (index <= count - 1) // if index is in middle
                {
                    current = head;
                    Node temp = null;

                    for (int i = 0; i < index; i++)
                    {
                        temp = current;
                        current = current.Next;
                    }

                    newNode.Next = current;
                    temp.Next = newNode;
                }
                else if (index == count - 1)// if index is last
                    Insert(item);
                else
                {
                    Console.WriteLine("ERROR: Index error");
                    return;
                }
                Count++;
            }
        }