The sealed modifier keyword prevents a C# class from being inherited. Similar to the final keyword in Java.
The sealed modifier keyword prevents a C# class from being inherited. Similar to the final keyword in Java.
Questions tagged [sealed]
183 questions
373
votes
6 answers
What is a sealed trait?
Sealed classes are described in 'Programming in Scala', but sealed traits are not.
Where can I find more information about a sealed trait?
I would like to know, if a sealed trait is the same as a sealed class?
Or, if not, what are the differences?…
John Threepwood
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votes
7 answers
Static and Sealed class differences
Is there any class that be implemented in static class? means:
static class ABC : Anyclass
Is there any class which can be inherited in both sealed class and static class?
means:
static class ABC : AClass {}
And
sealed class ABC : AClass…
Saurabh Mahajan
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74
votes
2 answers
Scala's sealed abstract vs abstract class
What is the difference between sealed abstract and abstract Scala class?
Łukasz Lew
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73
votes
6 answers
What is an internal sealed class in C#?
I was looking through some C# code for extending language support in VS2010 (Ook example). I saw some classes called internal sealed class
What do these do? Would one use them?
Byron Whitlock
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61
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6 answers
How to define sealed class in C++?
How to stop the class to be inherited by other class.
Shashi
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59
votes
3 answers
Is there an equivalent to "sealed" or "final" in TypeScript?
I'm trying to implement a method in a super class that should be available for use, but not changeable, in sub classes. Consider this:
export abstract class BaseClass {
universalBehavior(): void {
doStuff(); // Do some universal stuff…
bubbleking
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votes
4 answers
Should I seal all classes I know shouldn't ever be used as a base class?
Should I seal all classes I know shouldn't ever be used as a base class even when there are no tangible performance or security concerns, or is this just adding cruft?
Daniel Coffman
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6 answers
Sealed method in C#
I am a newbie in C#.I am reading about Sealed keyword.I have got about sealed class.I have read a line about Sealed method where we can make Sealed method also.The line was (By declaring method as sealed, we can avoid further overriding of this…
Mohit Kumar
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6 answers
Iteration over a sealed trait in Scala?
I just wanted to know if it is possible to iterate over a sealed trait in Scala?
If not, why is it not possible? Since the trait is sealed it should be possible no?
What I want to do is something like that:
sealed trait ResizedImageKey {
/**
*…
Sebastien Lorber
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38
votes
9 answers
Why aren't classes sealed by default?
I was just wondering, since the sealed keyword's existence indicates that it's the class author's decision as to whether other classes are allowed to inherit from it, why aren't classes sealed by default, with some keyword to mark them explicitly as…
xyz
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4 answers
Should IEquatable, IComparable be implemented on non-sealed classes?
Anyone have any opinions on whether or not IEquatable or IComparable should generally require that T is sealed (if it's a class)?
This question occurred to me since I'm writing a set of base classes intended to aid in the implementation of…
Phil
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What is the difference between a class having private constructor and a sealed class having private constructor?
Is there any difference between A and B?
Class A has private constructor:
class A
{
private A()
{ }
}
Class B is sealed and has a private constructor:
sealed class B
{
private B()
{ }
}
dvjanm
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3 answers
Sealed keyword in association with override
Is it always necessary to follow the sealed keyword with override in the signature of a method like the below code:
public sealed override string Method1(){.....}
I mean, if I want to "seal" the method within the base class without overriding, is…
Victor Mukherjee
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4 answers
Preventing a method from being overridden in C#
How do I prevent a method from being overridden in a derived class?
In Java I could do this by using the final modifier on the method I wish to prevent from being overridden.
How do I achieve the same in C#?
I am aware of using sealed but apparently…
nighthawk457
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Why are interfaces not able to be marked as sealed?
public sealed interface IMyInterface
{
}
Gives "The modified 'sealed' is not valid for this item"
I can understand in some ways that an interface must be descendable otherwise the class cannot implement it.
But why can I not specify that an…
weston
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