Using Attributes to Call Methods

Question

I have various individual methods which all need to perform the same functions before continuing on with their own implementation. Now I could implement these functions in each

Answer 1

You're right, it sounds a lot like AOP.
What you're after sounds like compile time weaving? I.e. the attribute is turned into additional code by the compiler.
You could look at how to implement this...
Generating additional code through a custom attribute
http://www.cs.columbia.edu/~eaddy/wicca/ &
http://www.sharpcrafters.com/aop.net/compiletime-weaving
all refer to tools and techniques for doing this.

Or you could use an AOP framework. IMHO, you should look at AOP frameworks.