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

Old question, but on newer versions of C# it looks like you can now do this for value types by using the this and ref keywords together. This will set value to be the same as valueToChange, even outside of this extension method.

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

I believe this change was made to the compiler on version 15.1, which I think corresponds to C# 7 (or one of its sub versions). I did not immediately find a formal announcement of this feature.