问题
One point is wondering in my mind since last few days. I want to know how Garbage collector work with static classes, variables?
As we all know Garbage collector keep track of objects that has been created in application and removed them automatically when they are no longer in use. For static class no object is created and it loaded in the memory with the application debug.
So Garbage collector handle static classes?
回答1:
Static classes don't need to be removed since they are not objects and they don't consume memory (other than the actual class code being loaded by the .NET infrastructure). On the other hand static fields in static classes are objects that consume memory. They won't be collected since they are accessible for the full lifetime of the application. If you want to free the memory you should set the field to null so that the object the field has been pointing to becomes eligible for GC
回答2:
He is never gonna release them. ( e.g. in WEB its until restart of the IIS).
They'll never say :" No one is referencing me so i'm free to go"
also
you can never do new to Static Class.... so its usages is merely by Class object ( not the instance).
So .net doesn't take any chances and keep it out of GC.
来源：https://stackoverflow.com/questions/8079887/garbage-collector-and-static-class-variable