public void __() { int[,] matrix = { { 1, 2, 3, 4 }, { 0, 6, 7, 8 }, { 9, 10, 0, 12 } }; matrix.Checkv1Exo8(); int[,] expected = { { 0, 2, 0, 4 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 } }; CollectionAssert.AreEqual(matrix, expected); }