Well... first of all, open ILDASM and drag/drop your EXE.

 

The application is called Attributes, and contains an annotated class, some annotated methods and fields. Notice the .custom instance void Attributes.xxxxxxxxx highlighted above. This tells you that the class is annotated.

Now, how would you tell if Bar, Foo, and FooBar methods or AttributedVar, NonAttributedVar are annotated or not? (as if the names were not self-explanatory)

Double clicking on AnotherAttributedVar and NonAttributedVar would give you the following respectively...

The story is pretty similar for annotated methods.

Cheers,
Rahul

Quote of the day:
Electricity is actually made up of extremely tiny particles called electrons, that you cannot see with the naked eye unless you have been drinking. - Dave Barry