... are building Windowsapplications and want to perform simple database access, oryou are creating middle-tier components to handle databaseaccess, understanding how to connect to a database, retrieveinformation, ... you can actually use the base class as a variable type, and you can handle any derived class with that new variable.For example, examine the following code. The Transportationclass contains ... whatimplementation inheritance is all about. VB.NET’s Implementation Inheritance In VB.NET, you don’t have to create a separate interface, although you can. Instead,you can just create a class with...