public void Combines() { var source = new[] { new byte[] { 1, 2, 3, 4 }, new byte[] { 5, 6, 7, 8 }, new byte[] { 9, 10 }, }; var expected = new byte[] { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 }; var actual = LargeArray.Combine(source); Assert.Equal(expected, actual); }