public void ValidatesFindLastMethod()
        {
            var list = new LinkedListCollection <int> {
                1, 2, 3, 4, 5
            };

            Assert.Equal(list.GetLast.Previous, list.Find(4));
        }
        public void ValidatesFindFirstMethod()
        {
            var list = new LinkedListCollection <int> {
                1, 2, 3
            };

            Assert.Equal(list.GetFirst, list.Find(1));
        }