public void TestMethod2()
        {
            // Arrange
            DiagonalTransverse question = new DiagonalTransverse();
            int[,] matrix = new int[,] { { 6, 9, 7 } };
            int[] expected = { 6, 9, 7 };

            // Act
            int[] actual = question.FindDiagonalOrder(matrix);

            // Assert
            CollectionAssert.AreEqual(expected, actual);
        }
        public void TestMethod1()
        {
            // Arrange
            DiagonalTransverse question = new DiagonalTransverse();
            int[,] matrix = new int[,] { { 1, 2, 3 }, { 4, 5, 6 }, { 7, 8, 9 } };
            int[] expected = { 1, 2, 4, 7, 5, 3, 6, 8, 9 };

            // Act
            int[] actual = question.FindDiagonalOrder(matrix);

            // Assert
            CollectionAssert.AreEqual(expected, actual);
        }