I’d like to create the context extension methods described in Cesar de la Torre’s blog post.
But I’m not sure how to declare the class that holds my extension methods.
Griff Townsend wrote:
If I include a reference to this class
(or have the class in my namespace),
any ObjectContext references will be
able to execute these extensions:
If you look at the tool tip in the
photo above, you should be able to see
that I can now cleanly access any
function that I add to the EntitySet
that I create.
How do I declare the class that holds my extension methods?

You just have to declare a static class :