Can We inherit the interface into another interface?

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Written By:-Isha Malhotra

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Can We inherit the interface into another interface?

Yes we can inherit the interface into another interface. It follows the same signature for inheritance as we use to inherit the class like:-

1.     Create first interface

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

Basic of Interface

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Basic of Interface

Interface is an entity which gives signature or a structure which class have to implement. It contains only declaration not definition. The class which implement the interface will give the definition to each member. It means we can only declare the method, property and event.

Simply interface is ‘what’ should be done and its implementation is ‘how’ it should be done.

Note:-1. All members of the Interface declared without access specifier like public, private etc.

2. We cannot declare any variable in interface.

3. All members should be implemented in the derived class.

Access specifier in C#

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Access specifier in C#

Access specifier defines the accessibility of class member. We can restrict and limit the accessibility of member of classes.

Access Specifier and their accessibility

Access Spicifier	With in class	Derived Class	Outside Class	With in Assembly
Public	Yes	Yes	Yes	Yes
Private	Yes	No	No	No
Protected	Yes	Yes	No	No
Internal	Yes	No	No	Yes
Protected internal	Yes	Yes	No	yes

Above table defines the accessibility of all access spicifier. As this table describe that public member can be accessd everywhere and private accessed only with in class. This create the protection level  that except the class member no other can access the private member of class.

Basic of Inheritance for beginner

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Basic of Inheritance for beginners

Inheritance is property of oops by which we access one class into another class without writing the whole code. The class that is inherited is called base class and the class that does the inheritance is called a derived class.

Note:- two way of accessing class.1. create the object of class. 2. Inherit this class.

Syntax for inheritance

Access-modifier class derived-class: base class

{

}

Article 5:-How Object is Created?

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How Object is Created?

Or

Why classes are called Reference Type

As we know that class is a user defined data type.

For creating the object of any class we write the following code:-

Class_Name  Object_Name=new Class_Name();

Suppose the class name is calculator. Then we create the object like that

Calculator cal = new calculator();

Article 4:-Classes in more detail

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Classes in more detail

Class is the way to realize real time entity in oops. It is the user defined data type. If we want to understand the classes in detail then we need to understand the following topics:--

Ø  Constructor:- for understanding the constructor in detail plz read the following link

Artical 1

Artical 2

Artical 3

Ø  Properties

Ø  Indexers

Interview question on Constructor

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1.      What is constructor?

2.      Can class have more than one static constructor?

3.      Can we create private constructor of a class?

4.      What is the type of the constructor?