Which class can't be inherited further ? :-Sealed & Static

Hi Naresh,

 

Sealed classes: 
1)Can create instances, but cannot inherit
2)Can contain static as well as nonstatic members.

Static classes:
1)Can neither create their instances, nor inherit them
2)Can have static members only.

Sealed Class

1. A class that is marked with the sealed (C#) keywords cannot be inherited. This is done at the definition of the classes.
2. A static class can inherit from other classes.
3. The most commonly used sealed class is System.String.

 

Static Class

1. A static class is a sealed class and therefore, cannot be inherited.
2. A static class cannot inherit from other classes.

 

Also, find below link for a static class

https://www.c-sharpcorner.com/interview-question/can-we-inherit-static-class-in-c-sharp

Static Class

A class can be declared static, indicating that it contains only static members. It is not possible to create instances of a static class using the new keyword. Static classes are loaded automatically by the .NET Framework common language runtime (CLR) when the program or namespace containing the class is loaded.

Sealed Class

A sealed class cannot be used as a base class. Sealed classes are primarily used to prevent derivation. Because they can never be used as a base class, some run-time optimizations can make calling sealed class members slightly faster.

 

You can let a sealed class inherit from another class, but you cannot inherit from a sealed class:

sealed class MySealedClass : BaseClass // is ok
class MyOtherClass : MySealedClass     // won't compile

A static class cannot inherit from other classes.

 

Class Type	Can Inherit From Other	Can Be Inherited	Can Be Instantiated
Normal	Yes	Yes	Yes
Abstract	Yes	Yes	No
Sealed	Yes	No	Yes
Static	No	No	No