C# sealed class creating its instance

Question

I know this is meaning less question, but I'm confused why sealed class create its instance.

public sealed class SealedClass1
{
    static SealedClass1()
    {
    }

    public string GetmeassageFromSealed(string mesage)
    {
        return mesage;
    }
}

Here i decorate my constructor as private

public sealed class SealedClass1
        {
            static SealedClass1()
            {

           }
      private Singleton()
            {

            }
            public string GetmeassageFromSealed(string mesage)
            {
                return mesage;
            }
        }

Sealed means you cannot inherit from it. That's the difference here. You can still create an instance, but cannot inherit — faheem khan, Dec 20 '17 at 04:56
Technically what you have there is a static constructor. Nowhere does it really create an instance of itself — David Pilkington, Dec 20 '17 at 05:08
@DavidPilkington im also surprice when its create instance chk This https://dotnetfiddle.net/Widget/Preview?url=/Widget/i4PmYr — Md Ghousemohi, Dec 20 '17 at 05:10
@MdGhousemohi You don't print the result from the `GetmeassageFromSealed` which is why it isn't showing — David Pilkington, Dec 20 '17 at 05:17

score 2 · Accepted Answer · answered Dec 20 '17 at 05:15

The sealed keyword in C# means that no class can inherit from that class.

So if you have this scenario:

public class Test { }

The following is valid

public class NewTest: Test { }

However, as soon as you add the sealed keyword, the compiler with throw an error when trying to compile that library.

public sealed class Test { }

public class NewTest: Test { }

This would throw

'NewTest' cannot inherit from sealed class 'Test'.

In short, the sealed keyword is a compile time check to ensure that there is no inheritence.

Thank a lot this is also workin at the same time when i create private constructor then also its working — Md Ghousemohi, Dec 20 '17 at 05:17

score 1 · Answer 2 · answered Dec 20 '17 at 04:58

1

A Sealed Class can be instantiated, also it can inherit from other classes but it can not be inherited by other classes.

answered Dec 20 '17 at 04:58

Habib Ur Rehman

188
10

https: could u please reffer this //dotnetfiddle.net/ – Md Ghousemohi Dec 20 '17 at 04:59
What do I have to refer? – Habib Ur Rehman Dec 20 '17 at 05:13
https://dotnetfiddle.net/Widget/Preview?url=/Widget/i4PmYr go throgh it – Md Ghousemohi Dec 20 '17 at 05:14
In the code you can create the object (instance) of class Employee but you can not invoke its method GetmeassageFromSealed(string mesage) as it can not be accessed(other word inherited). – Habib Ur Rehman Dec 20 '17 at 05:20
bhai i need 2 stop getting its instace – Md Ghousemohi Dec 20 '17 at 05:21
Bhai that's what I am telling you that you can create an instance of sealed class it's in its definition. :) – Habib Ur Rehman Dec 20 '17 at 05:26
Let us [continue this discussion in chat](http://chat.stackoverflow.com/rooms/161669/discussion-between-habib-ur-rehman-and-md-ghousemohi). – Habib Ur Rehman Dec 21 '17 at 05:02

C# sealed class creating its instance

2 Answers2