public void SinglyLinkedListTest()
{
ISinglyLinkedList <int> singlylinkedlist = new SinglyLinkedList <int>();
IPrintLinkedList printlist;
printlist = singlylinkedlist as IPrintLinkedList;
ISinglyLinkedNode <int> nodeone = new SinglyLinkedNode <int>(1);
ISinglyLinkedNode <int> nodetwo = new SinglyLinkedNode <int>(2);
ISinglyLinkedNode <int> nodethree = new SinglyLinkedNode <int>(3);
ISinglyLinkedNode <int> nodefour = new SinglyLinkedNode <int>(4);
printlist.PrintLinkedList();
singlylinkedlist.AddHead(nodeone);
singlylinkedlist.AddHead(nodetwo);
singlylinkedlist.AddHead(nodethree);
singlylinkedlist.AddHead(nodefour);
printlist.PrintLinkedList();
ISinglyLinkedNode <int> temp = singlylinkedlist.GetAt(2);
singlylinkedlist.RemoveAt(2);
//singlylinkedlist.RemoveAfter(temp);
//singlylinkedlist.Remove(temp);
printlist.PrintLinkedList();
//singlylinkedlist.RemoveHead();
//printlist.PrintLinkedList();
//singlylinkedlist.RemoveBefore(nodetwo);
singlylinkedlist.ReverseList();
printlist.PrintLinkedList();
}