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

Because int is value type, so it copied by value when you pass it inside a function.

To see the changes outside of the function rewrite it like:

public static int ChangeValue(this int value, int valueToChange)
{
    //DO SOMETHING ;

    return _value_; //RETURN COMPUTED VALUE 
}

It would be possible to do using ref keyowrd, but it can not be applied on parameter with this, so in your case, just return resulting value.