检测是否在c#中按下了任何键(不是A, B，而是任何)

[EDIT 3] I kind of "solved it" by at using the "strange" version. At least for the most important keys. It is suffient for my case, where I want to check that ALT and ALT+A are not the same (thereby making sure A is not pressed). Not perfect, but already to much time for such a tiny problem. Thanks for all the answers anyway... [EDIT 3][EDIT 3] I kind of "solved it" by at using the