The difference between "C #" abstract and virtual

First, virtual method (virtual method)

The virtual keyword is used to decorate a method in a base class. There are two things you can do with virtual:

Scenario 1: The virtual method is defined in the base class, but the virtual method is not overridden in the derived class. In a call to a derived class instance, the virtual method uses the method defined by the base class.

Scenario 2: The virtual method is defined in the base class and then overridden in a derived class by using override. In a call to a derived class instance, the virtual method uses the derived overridden method.

Ii. Abstract Method (Abstraction method)

The abstract keyword can only be used to decorate a method in an abstraction class, and there is no specific implementation. An implementation of an abstract method must be implemented in a derived class by using the override keyword.

Transferred from: http://www.cnblogs.com/blsong/archive/2010/08/12/1798064.html

The difference between "C #" abstract and virtual