问题
As the question states, I just wanted to know, because I've been asked and I don't have a clue, is there any reason for this whatsoever?
回答1:
When a class does not define a Finalizer (destructor), a call to SuppressFinalize() on an instance of that class has no effect.
When you see it, it usually is a left-over of the full Disposable implementation. Just remove it or ignore it.
回答2:
The reason might be to prevent potential error if someone adds a finalizer later on and forgets to add GC.SuppressFinalize().
来源：https://stackoverflow.com/questions/19078536/why-use-gc-suppressfinalize-when-there-is-no-finalizer