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C# - Inheritance of Interfaces Example

In this example, we will learn how to implement the inheritance of interfaces using C# program?
Submitted by Nidhi, on October 14, 2020 [Last updated : March 21, 2023]

Here, we will implement the inheritance of interfaces, here we will inherit one interface into another interface.

C# program to implement the inheritance of interfaces

The source code to demonstrate the inheritance of interfaces is given below. The given program is compiled and executed successfully on Microsoft Visual Studio.

//C# - Inheritance of Interfaces Example

using System;

interface MyInf1
{
    //Method Declaration
    void Method1();
}

interface MyInf2:MyInf1
{
    //Method Declaration
    void Method2();
}

class Sample : MyInf2
{
    //Method definition
    void MyInf1.Method1()
    {
        Console.WriteLine("Method1() called");
    }

    void MyInf2.Method2()
    {
        Console.WriteLine("Method2() called");
    }

    
}

class Program
{
    public static void Main(String[] args)
    {
        MyInf1 M1;
        MyInf2 M2;

        M1 = new Sample();
        M2 = new Sample();

        M1.Method1();
        M2.Method2();
    }
}

Output

Method1() called
Method2() called
Press any key to continue . . .

Explanation

Here, we created two interfaces MyInf1 and MyInf2. Here, we inherited the interface MyInf1 into MyInf2. Then implemented the MyInf2 interface in the class Sample. Here we implemented the methods of both interfaces.

Now look to the Program class, It contains the Main() method, the Main() method is the entry point for the program. Here we created the references of both interfaces that are initialized with the object of Sample class and then called the Method1() and Method2() that will print the appropriate message on the console screen.

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