是否有System.IO.Stream的接口？

I'm writing a class that needs to take in an object, record it's current state, update the object, and pass it to another class. The only problem is that you can only inherit from one class and I need that to inherit a class in my project. I'm interested in System.IO.Stream because I can if needed, move this class to it's own thread without most if not all of sockets and other methods of IPC. The main problem is, is there an interface for System.IO.Stream? If not, is there a way to get the functionality I want without sacrificing the project-critical data I depend on? (I'm sorry if I sound a little discoherent, I'm not really sure how to word this question.)I'm writing a class that needs to take in an ob