What is an interface in C# with example?

An interface may not declare instance data such as fields, auto-implemented properties, or property-like events. By using interfaces, you can, for example, include behavior from multiple sources in a class. That capability is important in C# because the language doesn’t support multiple inheritance of classes.

WHAT IS interface in C# with real time example?

An interface does not contain any constructor or data fields or destructor, etc. All of the methods of an interface are abstract and public by default. An interface is not extended by a class; it is implemented by a class. An interface can extend multiple interfaces.

What interface contains in C#?

Like a class, Interface can have methods, properties, events, and indexers as its members. But interfaces will contain only the declaration of the members. The implementation of the interface’s members will be given by class who implements the interface implicitly or explicitly.

What is the use of interfaces in C#?

Interfaces add a plug and play like architecture into your applications. Interfaces help define a contract (agreement or blueprint, however you chose to define it), between your application and other objects. This indicates what sort of methods, properties, and events are exposed by an object.

What is advantage of interface in C#?

One of the major advantages of Interface in C# is a better alternative to implement multiple inheritances. The interface enables the plug-and-play method. Complete Abstraction can be achieved by the implementation of Interface. Along with making our code easy to maintain, concept loose coupling can be achieved.

WHAT IS interface in real life?

A real-world example: Let’s consider the example of vehicles like bicycle, car, bike………, they have common functionalities. So we make an interface and put all these common functionalities. And lets Bicycle, Bike, car …. etc implement all these functionalities in their own class in their own way.

What are the advantages of interface in C#?

What are the advantages of using interfaces

• Interfaces allow us to implement polymorphic behaviour.
• Interfaces allow us to develop very loosely coupled systems.
• Interfaces enable mocking for better unit testing.
• Interfaces enables us to implement multiple class inheritance in C#.

Can we define property in interface C#?

Interface can contain declarations of method, properties, indexers, and events. Interface cannot include private, protected, or internal members. Interface cannot contain fields, and auto-implemented properties. A class or a struct can implement one or more interfaces implicitly or explicitly.

Why do we use interfaces?

Why do we use interface ? It is used to achieve total abstraction. Since java does not support multiple inheritance in case of class, but by using interface it can achieve multiple inheritance . It is also used to achieve loose coupling.

WHAT IS interface and why it is used?

What do you mean by interface?

Think of an interface as a “face-to-face,” a place where things, or people, or people and things (like you and your computer) meet. Any common boundary or area of convergence can be an interface. Used as a verb, interface means to merge or mingle, bonding and synthesizing by communicating and working together.

When to use interfaces?

Interfaces are better in situations in which you do not have to inherit implementation from a base class. Interfaces are useful when you cannot use class inheritance. For example, structures cannot inherit from classes, but they can implement interfaces.

When to use an interface?

One reason to use interfaces is when a class will implement a number of interfaces. An abstract class cannot do that. One example is a class which handles mouse movement and key presses will implement both the (ficticious) IMouseMove and IKeyPress interfaces.

How do you implement interface?

To declare a class that implements an interface, you include an implements clause in the class declaration. Your class can implement more than one interface, so the implements keyword is followed by a comma-separated list of the interfaces implemented by the class. By convention, the implements clause follows the extends clause, if there is one.

Can We creat an instance of an interface?

Yes you can create an instance of an interface using the anonymous inner class syntax and providing implementation of all the methods of the interface. Interfaces and Anonymous inner classes both can’t have a constructor. But you can create an instance initializer block in the anonymous inner class.