c# intermediate classes interfaces and oop

C + + language learning (15)--c++ abstract class and interface one, abstract class and interface 1, abstract class introductionObject-oriented abstract classes are used to represent the abstract concept of the real world, a class that can only define types, cannot produce objects (cannot be instantiated), can only be inherited and be overridden by related functio

Similarities:(1) can be inherited(2) cannot be instantiated.(3) All methods can contain method declarations.(4) The derived class must implement the unimplemented method.Partition:(1) abstract base classes can define fields, attributes, and methods. The interface can only define attributes, indexers, events, and method declarations, and cannot contain fields.(2) abstract classes are incomplete

callback, but inheritance does not.5. the abstract class cannot be sealed.6. The specific methods implemented by abstract classes are virtual by default, but the interface methods in the class implementing interfaces are non-virtual by default. Of course, you can also declare them as virtual.7. Similar to a non-abstract class, an abstract class must provide its own implementation for all the members of the

. interfaces can be used to support callback, but inheritance does not. 5. the abstract class cannot be sealed. 6. The specific methods implemented by abstract classes are virtual by default, but the interface methods in the class implementing interfaces are non-virtual by default. Of course, you can also declare them as virtual. 7. Similar to a non-abstract

Ext.: http://www.cnblogs.com/djzxjblogs/p/7587735.htmlDuring the first interview, the interviewer asked me the difference between abstract classes and interfaces.I also, in accordance with the interview on the answer, said a lot of.The interviewer asked again: "You said a lot, have you ever thought about their essential differences."At that time I really did not think about, but back to normal use of abstract class and interface, feeling is still stuc

interface in reality, so I always think that the word interface (interface) is really in the likeness! Another advantage of using the interface is that different parts or levels of developers can work in parallel, like making a hard disk without the CPU, and do not wait for the display, as long as the interface is consistent, reasonable design, can be developed in parallel, thereby improving efficiency. Supplement to this article: 1. About "interface" in "interface-oriented programming" and "

The problem arises: When we use the abstract classes and interfaces of C #, we often encounter the following similar problems, broadly summarized as follows: (1) What are the essential differences and connections between abstract classes and interfaces? (2) When to choose t

C # differences between the inheritance of virtual base classes and interfaces, Class defines the new data types and the method of mutual operations of these new data types: class Cat { // .......... } class Cat : object { // .......... } C # All classes

My understanding of abstract classes and interfaces in C #Abstract classes in C # are similar to interfaces, which are easy to confuse for beginners. Let's talk about their understanding today. First, we need to clarify the meanin

C # What are the benefits of abstract classes and interfaces of polymorphism ~~, The similarities and differences between the abstract classes of polymorphism and interfaces may not be very complete. Learn from the experiences of watching videos and writing articles by yours