int$[.]$ matrix$=$ new int$[]\{(1,2,3),(4,5,6),(7,8,033$int sum $=0$;for$($int $10$; $1$ matrix.GetLength$(0)$; i$++)\{$Int product matrix$[1\mathrm{.}0]$;for$($int j $=1$; j matrix.GetLength$(1)$; j$++)\{56789$ S$10\}$product matrix$[$i$,$j$]$:$\}$sum product;$234$Console.WriteLine$($sum$)$;