WHAT IS interface in C# with example?
In C#, an interface is similar to abstract class. However, unlike abstract classes, all methods of an interface are fully abstract (method without body). Here, IPolygon is the name of the interface.
Does C# have interface?
2) C# does not support “multiple inheritance” (a class can only inherit from one base class). However, it can be achieved with interfaces, because the class can implement multiple interfaces. Note: To implement multiple interfaces, separate them with a comma (see example below).
What type is an interface C#?
Some of the interface types in C# include. IEnumerable − Base interface for all generic collections. IList − A generic interface implemented by the arrays and the list type. IDictionary − A dictionary collection.
What are the benefits of interfaces 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.
Can interface be instantiated C#?
An interface can’t be instantiated directly. Its members are implemented by any class or struct that implements the interface. A class or struct can implement multiple interfaces.
What is difference between abstraction and interface?
Abstract class and interface both are used to achieve abstraction where we can declare the abstract methods….Difference between abstract class and interface.
| Abstract class | Interface |
|---|---|
| 3) Abstract class can have final, non-final, static and non-static variables. | Interface has only static and final variables. |
What is difference between interface and abstraction in C#?
In C#, an Interface provides only those public services declared in the interface, whereas an abstract class provides the public services defined in an abstract class and those members that are inherited from the abstract class’s base class.
How do you implement an interface in C?
In C#, a class or a struct can implement one or more interfaces. In C#, an interface can be defined using the interface keyword. Interfaces can contain methods, properties, indexers, and events as members. Consider the following IPen interface that declares some basic functionality for a pen.
What are the characteristics of an interface?
An interface contains only the signatures of methods, properties, events or indexers. A class or struct that implements the interface must implement the members of the interface that are specified in the interface definition.
Can an interface have a body in C?
An interface can be a member of a namespace or a class. An interface declaration can contain declarations (signatures without any implementation) of the following members: These preceding member declarations typically do not contain a body. Beginning with C# 8.0, an interface member may declare a body.
Why do we need to implement interfaces explicitly?
It is recommended to implement interfaces explicitly when implementing multiple interfaces to avoid confusion and more readability. Interface can contain declarations of method, properties, indexers, and events. Interface cannot include private, protected, or internal members. All the members are public by default.