What you have already works. If the partial
method doesn't have an implementation, then it does not exist at all. There is no "declaration stub" that you might find by reflection accidentally. Either the partial method has an implementation, or it is removed completely by the compiler.
So basically: if you can't find the method with GetMethod
/ GetMethods
(with the appropriate BindingFlags
, as per the question) - then it wasn't implemented.