>That's what I'm trying to avoid. I don't want to create a class for just one use. If I can't use a class at least twice, what's the point of creating it?

I see what you mean. Sometimes we create a class that's not gonna be reused in order to "manage complexity". But that's not your case.

I think I'm missing your point: if this is something so specific for this button, why don't you just put the code on its Click method?