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.

Inheritance involves a base class and a relative class.

One common use of the this keyword is to overcome the shadowing of a field name by a parameter name.

If a class’s properties have set accessors, the class is probably immutable.

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());

It is permissible to pass null as an argument to a reference type parameter in a method.