How to pass ctor args in Activator.CreateInstance or use IL?

Question

I need a performance enhanced Activator.CreateInstance() and came across this article by Miron Abramson that uses a factory to create the instance in IL and then cache it. (

Answer 1

Has your profiler shown you that a large amount of time is spent in Activator.CreateInstance() (and not any constructor called by it) if you don't use the simple approach. If that is not the case, just use Activator.CreateInstance. (There seems to not be a generic CreateInstance() method with ctor arguments, but there is a non-generic one).