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What is Sealed Class?

Topic Name Introduction to C# Environment Setup C# Keywords Contextual Keywords C# Namespaces What Is Class? What is Object? Data Types Nullable Types C# Variables What are Access Modifiers? What is Property? What is Indexer? Hello world Program What is Type conversion? What is if else condition? What is Array? What is Jagged Array? What is ArrayList? What is List? What is string and StringBuilder? What is for loop? What is foreach loop? What is switch? What is Method? What is method overloading? What is Constructor? What is constructor overloading? What is Boxing and Unboxing? What is delegate in C# and uses of delegates? What is Inheritance? What are Value types and Reference types? What is Exception Handling? What is struct? What is Dictionary? What is Hashtable? What is interface? What is Abstraction? What is Polymorphism? What is Enums? What is Sealed Class? What is Partial Class? Extension Methods? What is static? What is Encapsulation? Difference between Equality Operator (==) and Equals() Method in C# ? What is IEnumerable? What is Serializing? What is LINQ? Differences between IEnumerable and IQueryable? What is Multithreading? What is File Handling? What is late binding and early binding? What is Singleton Design Patterns?
1/12/2020 1:06:13 AM

A sealed class is a class which is use the Sealed key word before write class. Sealed class have some specialty provide for programmer. Once we declare this classes are sealed then it can’t the inherit from other class. Even another sealed class can’t inherit from sealed class. We can notice the C# library class are use the sealed keyword so we can’t inherit the library class. String is also sealed class. Now given bellow the sealed class example code:

using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using testForClass1;

namespace testFor
{
   // Sealed class  
    public sealed class Human
    {
        public string Name { get; set; }
        private string Email { get; set; } 
    }

    public class Program
    {
        static void Main(string[] args)
        {
            Human sealedClass = new Human();
            sealedClass.Name = "Farhan Sakib";
            Console.Read();
        }
    }
}

In this sealed class has two property Name and Email. Name field we can access by create the object. Email field is privet so we can’t access. Also we can’t inherit the Human class because this class is sealed class.

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