what is an interface in c#

JackHasSoup answered on August 10, 2020 Popularity 10/10 Helpfulness 3/10

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what is an interface in c#

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Okay, imagine you have a box of crayons. Each crayon has a specific color, right? Now, think of a C# interface like a coloring book page. The coloring book page has outlines of different shapes and pictures, but it doesn't have any colors yet.

In C#, a class is like a set of crayons with actual colors. It's a blueprint that tells you what the crayons should look like and what colors they should have. When you create an object from a class, it's like having a physical crayon from that set with all the colors filled in.

Now, an interface in C# is a bit like a blank coloring book page. It doesn't have any colors (methods or properties with implementation) of its own. Instead, it just says, "Hey, if you want to use me, you need to promise that you'll have these colors (methods or properties)." It sets the rules but doesn't provide the actual implementation.

So, while a class gives you the actual crayons with colors, an interface tells you what colors you should have without providing them. It's like a contract that says, "If you want to be my friend (use this interface), you need to know how to say hello (implement these methods)."

To sum it up, a class is like having a complete set of crayons with colors, and an interface is like a coloring book page that outlines what colors you should have without filling them in.

Popularity 10/10 Helpfulness 3/10 Language csharp

Source: Grepper

Tags: c# interface

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Contributed on Nov 12 2023

JackHasSoup

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creating interface in C#

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using System;

namespace Grepper_Docs
{
    public interface IWhatever
    {
        bool doSomething(); //Interface methods don't have bodies or modifiers
    }
  
  	class Program : IWhatever
    {
        static void Main(string[] args)
        {
            var pro = new Program();
            pro.doSomething();
        }

        public bool doSomething() //methods must be public
        {
            return true;
        }
    }
}

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Source: Grepper

Tags: c# c

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Contributed on Aug 10 2020

Col8tor

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C# interface

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using System;
namespace InterfaceDemo
{
   public interface IA
   {
     void puta();
   }
   public interface IB
   {
     void putb();
   }
   public class C: IA, IB
   {
       private int a;
       private int b;
       public C(int x, int y)
       {
           a = x;
           b = y;
       }
       public void puta()
       {
           Console.WriteLine("a = {0}", a);
       }
       public void putb()
       {
           Console.WriteLine("b = {0}", b);
       }
   }
   class Test
   {
     static void Main(string[] args)
     {
        C obj = new C(17, 4);
        obj.puta();
        obj.putb();
     }
   }
}

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Contributed on Feb 06 2023

Odd Osprey

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c# interface implementation

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-1

// C# program to demonstrate working of 
// interface
using System;
  
// A simple interface
interface inter1
{
    // method having only declaration 
    // not definition
    void display();
}
  
// A class that implements interface.
class testClass : inter1
{
      
    // providing the body part of function
    public void display()
    {
        Console.WriteLine("Sudo Placement GeeksforGeeks");
    }
  
    // Main Method
    public static void Main (String []args)
    {
          
        // Creating object
        testClass t = new testClass();
          
        // calling method
        t.display();
    }
}

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Source: www.geeksforgeeks.org

Tags: c# c

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Contributed on Nov 17 2022

Bilal Shafi

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what is an interface in c#

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