Author: Anonymous

Data stored in databases is organized into one or more tables.

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

A class that is not intended to be instantiated but is to be used only as a base class is called a concrete class.

There are numerous DBMSs in use today and Visual C# can interact with many of them.

If you want to create an abstract read-only property, leave out the set accessor.

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

Only methods in a derived class can directly access the base class’s private members.

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

Assume you have written a ToString method in a class, and created an instance of the class named object1. The following two statements are equivalent:MessageBox.Show(object1);MessageBox.Show(object1.ToString());

A method can return a primitive value or a struct object, but it cannot return an object that is an instance of a class.