How to create fxcop rule to check that a class call init in its constructor on another class?

Let's say I have class A which instantiates class B. class B has a constructor and several init methods (enforced through a class interface). How to write fxcop rule to check that 开发者_运维技巧at least one init method is called after instantiating B.

What if you load it at runtime from internet you cannot use constructor so the init.

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This sort of rule is nearly impossible to write except for the most trivial cases. For example, if you want to ensure that a B init method is called immediately after invoking a B constructor, that can be done relatively easily (although branching logic can cause problems even there). However, there wouldn't be much need for a separate init method if one only needed to support such trivial usage. What is generally more interesting to detect are cases where one attempts to do something else with a B instance before invoking its init method, and that's not really a job for a static verifier like FxCop.

Have you considered throwing an exception from B if it is not initialized at entry into another method (much like one might throw an ObjectDisposedException from a disposed instance)?