what is difference between Abstract and interface?

Question

what abstract class can do that all things have performed by interface but what is the exact reason for interface, i can unterstood "interface support mutliple class inherite" is it so please explain me with live example.

Prasham Sabadra · Answer

Hi Please check once - http://www.c-sharpcorner.com/UploadFile/93126e/difference-between-abstract-class-and-an-interface/

Dharmraj Thakur · Answer

Just read....

Karthi Keyan · Answer

@Siva, See the below link. More number of defenition given by the experts.So you will clearly understand the difference. https://stackoverflow.com/questions/1913098/what-is-the-difference-between-an-interface-and-abstract-class Hope it will help you.

Saravanan V · Answer

Using Interfaces, we can properly create a decoupled layer architecture compared to abstract class. This is the most fundamental reason why interface is used in .NET projects. It helps application code to stay decoupled and thus easier to refactor, change, and redeploy so that you can easily work on the maintanence phase. The other famous reason is to have multiple inheritance. Abstract class are created for related entities where as Interfaces can be used for unrelated entities. You could reference the below MSDN link. https://msdn.microsoft.com/en-us/library/3b5b8ezk(v=vs.90).aspx

Thiruppathi R · Answer

Easy explanation refer this url https://www.codeproject.com/Articles/11155/Abstract-Class-versus-Interface

Hassan Uddin Mughal · Answer

Abstract classes are like a coach. They provide their functionalities to other classes. Abstract classes can have both abstract and non abstract members. Abstract classes are closely related to interfaces and they cann't be instanciated. One key difference between abstract classes and interfaces is that a class may implement an unlimited number of interfaces, but may inherit from only one abstract classes. Interfaces can only have abstract members they cann't have non abstract members. And last thing interface can be used for multiple inheritance.