From virtual extension methods to mixins

[Tom Hawtin]

To be clear, I am saying there exists no good way to resolve the 
problems of multiple inheritance. The particular solution to colliding 
abstract methods from the existing specification is (presumably) going 
to have to do (although the whole defender method thing seems a perverse 
response to an old library design fault). Of course, multiple 
inheritance (of interface or interface with code) should be actively 
discouraged.

Tom