public void Testingstack_Using_LinkedlistPeek(int[] arr, int Expected)
        {
            var stack_Using_Linkedlist = new Stack_Using_Linkedlist();

            for (int i = 0; i < arr.Length; i++)
            {
                stack_Using_Linkedlist.Push(arr[i]);
            }

            var result = stack_Using_Linkedlist.Peek();

            Assert.AreEqual(Expected, result);
        }
        public void Testingstack_Using_LinkedlistPush(int[] arr)
        {
            var Expected = new List <int>()
            {
                16, 5, 10
            };

            var stack_Using_Linkedlist = new Stack_Using_Linkedlist();

            for (int i = 0; i < arr.Length; i++)
            {
                stack_Using_Linkedlist.Push(arr[i]);
            }

            var result = stack_Using_Linkedlist.PrintStack();

            Assert.AreEqual(Expected, result);
        }