Change value inside an (void) extension method

Question

So I have this mock extension method which change a value to another value:

public static void ChangeValue(this int value, int valueToChange)
{
    value = value         


        

Answer 1

You can't do that without using either a return value, or a ref parameter. The latter doesn't work alongside this (extension methods), so your best bet is a return value (rather than void).