The way .overrides and virtual work in IL, you can actually have multiple chains of virtual methods with the same name on an object, by using 'new' to establish a new chain. It's also possible to use .overrides to override ordinary virtual methods instead of just interface methods.

C# and VB.net don't use either of these features extensively (though it's possible to do the chains using a mixture of 'new' and 'virtual') but it is probably necessary to implement this at some point anyway.