Filtering UI API event in C#

I am considering using UI API via C# for building add-ons. I am able to create new menus, submenus etc, but I have trouble with filtering menuevents.

All the samples have been written in Visual Basic and in this area the approach in C# is very different (unlike the DI API, for instance, which is very easy to work with in C#).

Is there anyone out there using UI API with C# that could spare a few lines of sample code ?

Henry