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int[] newarr = new int[10];
int[] newarr2 = new int[5] {1, 2, 3, 4, 5 };
int[] newarr3 = { 1, 2, 3, 4, 5 };

int[,] newarr4 = new int[2, 3] { {1, 2, 3 }, {2, 3, 4 } };
int[,,] newarr5 = new int[2, 3, 4];
for (int i = 0; i < 2; i++)
    for (int j = 0; j < 3; j++)
        for (int k = 0; k < 4; k++)
        {
            newarr5[i, j, k] = i + j + k;
        }

Console.WriteLine(newarr3.GetLength(0));
Console.WriteLine(newarr.GetUpperBound(0));
newarr3.CopyTo(newarr2,2);
newarr3.BinarySearch(2);