Each subsequent time an application runs, it connects to the copy of the database in the output folder, rather than the project folder.

The table column designated as the primary key must hold a unique value for each row.

To bind a ListBox control to a column, you must set either the DataSource property or the DisplayMember property but not both.

Assume that class B is derived from class A, and method M has a class A reference variable as a parameter. This means that method M cannot accept a reference to a class B object as an argument.

A statement that tries to use the new operator to instantiate an abstract class will not compile.

When developing applications that work with an intensive amount of data most developers prefer to use a database management system.

When program code instantiates a derived class object, the base class constructor executes first, followed by the derived class constructor.

You can think of a derived class as an extended version of some base class.

If class B is derived from class A, the methods in class B cannot access fields in class A that are declared protected.

Properties in a base class can be overridden in the same way that methods can be overridden.