Re: ref object or object with ref field

[Krux02]

I think you should put the ref to the object, just because it seems more 
natural to me. For the performace it probably doesn't matter but from the 
logical way it doesn't make a lot of sence to have a value type Context that 
when copied doesn't really copy but still refer to the same data. You should 
make the object a ref type, because it is more honest about what it is.