Sealed,Partial Classes and Inheritance

Sealed Classes:

Classes which cannot be inherited are nothing but sealed classes.

Partial Classes:

It is possible to split the definition of a class or a struct, or an interface over two or more source files. Each source file contains a section of the class definition, and all parts are combined when the application is compiled.

Inheritance:

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

namespace Csharp

{

    class Inhertiance

    {

        public static void Main(string[] args)

        {

            Reptiles obj = new Reptiles();

            obj.Birds();

            obj.Mammals();

            obj.reptiles();

            Console.ReadLine();

        }

     

    }

    class animals

    {

        public void Mammals()

        {

            Console.WriteLine("The rat belongs to mammals family");

        }

        public void Birds()

        {

            Console.WriteLine("The eagle belongs to birds family");

        }

    }

    class Reptiles : animals

    {

        public void reptiles()

        {

            Console.WriteLine("The snake belongs to reptiles familY");

        }

    }

}