What is sealed class in C#?

In today's post i am going to cover "What is Sealed class in C#  "?

Sealed is a keyword to declare a class as sealed.A class which can not be inherited is know as sealed class.

Sealed classes are used to restrict the inheritance feature of object oriented programming. Once a class is defined as sealed class, this class cannot be inherited. A sealed class cannot be used as a base class. For this reason, it cannot also be an abstract class. Sealed classes are primarily used to prevent derivation.

Note:Sealed classes can never be used as base class.

Below code will show how to declare sealed class.

Sealed Method

When an is decorated with a sealed modifier, that method is said to be a sealed method.A sealed method overrides an inherited virtual method with the same signature. A sealed method shall also be marked with the override modifier. Use of the sealed modifier prevents a derived class from further overriding the method.

Here is the example to explain the above sentences.


Below i have tired to show how sealed keyword is used to prevent a method to be further overloaded.

Hope you have enjoyed the post.Please provide your feedback.

Thanks.