What will be the output for the following program

Question

public class Calculator

{

public int Sum(int x, int y)

{

return x + y;

}

}

public class Client1

{

public void Operation()

{

int a = 4;

int b = 5;

//Find Sum of a and b and formula of sum will be x+y for client1

}

}

public class Client2

{

public void Operation()

{

int a = 4;

int b = 5;

//Find Sum of a and b and formula of sum will be 3x+4y+7 for client2

}

}

Can anyone tell me how i can acheive this in c# ? 

 

Thank you