static void Main(string[] args)
{
var linkedList = new MyLinkedList();
linkedList.AddLast(10);
linkedList.AddLast(20);
linkedList.AddLast(30);
linkedList.AddFirst(5);
linkedList.AddFirst(1);
Console.WriteLine(linkedList.IndexOf(30));
Console.WriteLine(linkedList.Contains(1));
Console.WriteLine(linkedList.GetSize());
Console.WriteLine(linkedList.GetSize());
Console.WriteLine(String.Join(',', linkedList.ToArray()));
linkedList.Reverse();
Console.WriteLine(String.Join(',', linkedList.ToArray()));
Console.WriteLine(linkedList.GetKthFromTheEnd(3));
linkedList.PrintMiddle();
}