What is sealed class in c#?

Sealed classes are used to restrict the inheritance feature of object oriented programming. Once a class is defined as a sealed class, the class cannot be inherited. In C#, the sealed modifier is used to define a class as sealed

You can not inherit class form the seal class. If you know the Java then it is similar to "final class" in Java. Here is MDSN page for few examples. 

https://msdn.microsoft.com/en-us/library/88c54tsw.aspx

A class that cannot be inherited in order to protect it's functionality.

A sealed class is the one which can not be inherited by other classes.A class can be declared as sealed by using the keyword "sealed" in class declaration.

Seales class is the feature of OOP . A class cannot be inherited from outside scope.

sealed class is used to the define inheritance level of a class.sealed classes are used to restrict the inheritance feature in object oriented .it can be derived but it is not a base class .once a class is defined as a sealed class it cannot be inherited.

When we define a class with "sealed" modifier, we cannot inherit it. It's equivalent to NonInheritable on VB.NET

Class is declared as Sealed in order to prevent it from being Inherited.

C# offers a sealed keyword for protecting classes to be inherited. Why use Sealed classes ? You are implementing some security features using that particular class and don't want the object to be manipulated. Secondly, sealed keyword is an indication to Common Language Runtime (CLR) that there are no sub-classes to look down which further increases overall performance if properly used.

Sealed, as is name indicates lock the class from inheritance.

So simple is that sealed classes cannot be inherited.

restrict the inheritance feature of object oriented programming.