public static void Main()
int a = 5, b = 6, result_sum = 0, result_prod = 0;
Calculate( a, b, out result_sum, out result_prod );
Console.WriteLine( $"A: {a} B: {b} Sum: {result_sum} Prod: {result_prod}");
public static void Calculate( int a, int b, out int sum, out int prod )