public void Nulleble()
        {
            double[,] mas = new double[, ] {
                { 0, 0, 0 }, { 0, 0, 0 }, { 0, 0, 0 }, { 0, 0, 0 }
            };
            int n      = 3;
            int m      = 4;
            var result = MyExample.SumChetIndexMassiv(mas, n, m);
            var otvet  = 0;

            Assert.Equal(result, otvet);
        }
        public void OneTwo()
        {
            double[,] mas = new double[, ] {
                { 1, 2, 3 }, { 1, 2, 3 }, { 1, 2, 3 }, { 1, 2, 3 }
            };
            int n      = 3;
            int m      = 4;
            var result = MyExample.SumChetIndexMassiv(mas, n, m);
            var otvet  = 12;

            Assert.Equal(result, otvet);
        }