Attributes are meta data - that's all they are.
There are many tools that can take advantage of such metadata, but such tooling needs to be aware of the attribute.
AOP tools like PostSharp read such metadata in order to know what and where to weave aspects into code.
In short - just writing an AtomicAttribute will give you nothing - you will need to pass the compiled assembly through a tool that knows about this attribute and do "something" to it in order to achieve AOP.
