difference between static and sealed class in .NET

Question

2.38/5 (4 votes)

See more:

Hi Dear friend ,

I have one question

i have study both class static or sealed class

1)Both class can't be inheritance
2)we can not create object
3) we directly use by name

but what is the differences in these two class

i think all this answer as fresher level .
but i want answer as a experience person

Thanks in advance
Anil kumar

Posted 18-Sep-11 20:56pm

anil_bang0011

Updated 28-Oct-17 18:03pm

Add a Solution

6 solutions

Solution 5

* A static class can only contain static members (it is just a container for methods that do not logically belong to an instance of any standard class)
* An abstract class can cotnain all usual kinds of members (static, abstract and also instance)

Posted 19-Sep-11 0:42am

member60

Solution 9

but some points is clear this topic:-
1) Both static and seales can't be inherited but we can inherit static class by other
static class, where as sealed can't be never ihherited.
2). we can't craete object of static class where as we can create object of sealed class.
3). we can not use sealed class as a base class where as static can be use as a base class.

Posted 28-Oct-17 18:03pm

Member 13491331

Comments

CHill60 29-Oct-17 3:54am

Those points were made clear 6 years ago. Stick to answering new questions where the OP still needs help

phil.o 29-Oct-17 10:16am

"we can inherit static class by other static class"
"static can be use as a base class"
These statements are false.

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

OriginalGriff · Accepted Answer · 2011-09-18T21:29:00

They are completely different.

A sealed class cannot be inherited: that is it's only difference from any other type of class.

A static class cannot be instantiated. You cannot, at any time write new MyStaticClass() without the compiler complaining. It never has a this reference, and the fields, properties and methods can only ever be accessed via the class name: MyStaticClass.MyMethod() In addition, you cannot derive from a static class, not can a static class derive from any class other than object

Simon Bang Terkildsen · Accepted Answer · 2011-09-18T21:22:00

A static class can only contain static Methods, Properties and Fields and what you wrote in 1), 2) and 3) applies.
A sealed class is a normal class which you can make an instance of, but you cannot inherit from it. what you wrote in 2) and 3) does not apply to sealed classes, tough a sealed class can have static methods and thus you can argue 3) applies.

For a more indepth view see Static Classes and Static Class Members[^], sealed (C# Reference)[^] and Abstract and Sealed Classes and Class Members[^]

sachin10d · Accepted Answer · 2011-09-18T21:24:00

Solution 2

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.

Posted 18-Sep-11 21:24pm

sachin10d

Comments

RaisKazi 19-Sep-11 5:18am

my 5!

Shambhoo kumar 28-Jan-13 6:57am

great difference...thanks alot..
my 5!
:)

Morgs Morgan · Accepted Answer · 2011-09-18T21:24:00

Solution 3

1. A Sealed class cannot be inherited from and can static and non-static members or methods. Contains a public constructor.
2. A Static class cannot be inherited from and contains only static methods and class properties. Contains a private constructor.

Posted 18-Sep-11 21:24pm

Morgs Morgan

Comments

Preethi PS 22-Aug-12 3:08am

Why cant a static class be inherited?

difference between static and sealed class in .NET

6 solutions

Solution 4

Solution 1

Solution 2

Solution 3

Solution 5

Solution 9

Add your solution here

Preview 0