Frans,

Please add a nongeneric base class for EntityCollection<T>. The reason is that I can't hook up a DebuggerVisualizer otherwise.

Hmm, is the normal debuggervisualizer working for EntityCollection<T> ?

(you could use IEntityCollection2 too as the type)

It seems like it won't work with an interface and I messed something with generic parameter version, the hook should work now.

I finally figured out why I didn't see my visualizer. Because my EntityCollection<> classes are decorated with DebuggerDisplay attribute. Oddly it turns off visualization for that class.

Now, before I adventure to find a solution, do you know by any chance a workaround?

Not an easy one. The most simplest I think is that you place the debuggervisualizer in the runtime library debuggervisualizer project and remove the original one and recompile that project, place that dll in the vs.net debugger visualizer folder.