Factory pattern in C#: How to ensure an object instance can only be created by a factory class?

Question

Recently I\'ve been thinking about securing some of my code. I\'m curious how one could make sure an object can never be created directly, but only via some method of a fact

Answer 1

I don't think there is a solution that's not worse than the problem , all he above require a public static factory which IMHO is a worse problem and wont stop people just calling the factory to use your object - it doesnt hide anything . Best to expose an interface and/or keep the constructor as internal if you can that's the best protection since the assembly is trusted code.

One option is to have a static constructor which registers a factory somewhere with something like an IOC container.