I've got a BaseDataClass with shared fields and functions

    Protected Shared dbase as SqlDatabase
    Protected Shared dbCommand as DBCommand
    ...
    //also have a sync object used by the derived classes for Synclock'ing
    Protected Shared ReadOnly syncObj As Object = New Object()

    Protected Shared Sub Init() //initializes fields, sets connections 
    Protected Shared Sub CleanAll() //closes connections, disposes, etc.

I have several classes that derive from this base class. The derived classes have all Shared functions that can be called directly from the BLL with no instantiation.
The functions in these derived classes call the base Init(), call their specific stored procs, call the base CleanAll() and then return the results.

So if I have 5 derived classes with 10 functions each, totaling 50 possible function calls, since they are all Shared, the CLR only calls one at a time, right? All calls are queued to wait until each Shared function completes.

Is there a better design with having Shared functions in your DAL and still have base class functions? Or since I have a base class, is it better to move towards instance methods within the DAL?