How to give access restriction to DLL's in .net

Question

I have a 3 layer application(UI,Business Layer,Data Layer).My requirement is my datalayer should be only accessible by business layer,and the business layer should be only accessible by UI layer.

That means even if i add a reference of adtalayer in the UI layer,it should not be able to access the methods in Datalayer.

I should be able to create DLL's with access protection.

please suggest a solution for this?

Thanks

SC

Answer 1

您可以标记键类或方法在您的业务和数据层的构造函数internal ，然后使用InternalVisibleTo属性扩展，获得相应的组件。

Answer 2

Sounds to me like what you're looking for is called "policy injection". I'm not sure if this is the easiest or best way, but PostSharp will do what you want.