Should I use an interface or abstract class?
Abstract classes should be used primarily for objects that are closely related, whereas interfaces are best suited for providing a common functionality to unrelated classes. Interfaces are a good choice when we think that the API will not change for a while.
What is difference between class and interface in C#?
A class contains attributes, methods and events as its components. Interfaces contain only method prototypes, they don’t provide an implementation of its methods, we can provide an implementation of its methods in our class, for that we can implement the interface. An interface is the source for polymorphism.
Why do we use interfaces in C#?
Why And When To Use Interfaces? 1) To achieve security – hide certain details and only show the important details of an object (interface). 2) C# does not support “multiple inheritance” (a class can only inherit from one base class).
What is the major difference between interfaces and classes?
Differences between a Class and an Interface:
| Class | Interface |
|---|---|
| A class can be instantiated i.e, objects of a class can be created. | An Interface cannot be instantiated i.e, objects cannot be created. |
| Classes does not support multiple inheritance. | Interface supports multiple inheritance. |
Why do we use interface in C#?
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.
Why do we use interface in C# with real time example?
The Interface in C# is a fully un-implemented class used for declaring a set of operations of an object. So, we can define an interface as a pure abstract class which allows us to define only abstract methods. The abstract method means a method without a body or implementation.
What is the advantage of using 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.
Why interfaces are better than abstract classes?
The short answer: An abstract class allows you to create functionality that subclasses can implement or override. An interface only allows you to define functionality, not implement it. And whereas a class can extend only one abstract class, it can take advantage of multiple interfaces.
What is Diamond problem in C#?
The “diamond problem” is an ambiguity that arises when two classes B and C inherit from A, and class D inherits from both B and C. If there is a method in A that B and C have overridden, and D does not override it, then which class of the method does D inherit: that of B, or that of C?
Why interface is loosely coupled in C#?
A loose-coupling architecture When classes are not dependent on one another, and depend on interfaces is known as loose-coupling architecture. Now instead of having sub class that inherits from a base class, we swap the base class with an interface.