Driver code
public static void Main ( String [ ] args ) { int [ , ] M = { { - 3 , - 2 , - 1 , 1 } , { - 2 , 2 , 3 , 4 } , { 4 , 5 , 7 , 8 } } ; int r = M . GetLength ( 0 ) ; int c = M . GetLength ( 1 ) ; Console . WriteLine ( countNegative ( M , r , c ) ) ; } }