What are sealed classes in C# dotnet

In C# (.NET), a sealed class is a class that cannot be inherited. This means no other class can derive from a sealed class. You use the sealed keyword to declare such a class.

sealed class FinalLogger

{

    public void Log(string message)

    {

        Console.WriteLine($"Log: {message}");

    }

}

 

// This will cause a compile-time error

class CustomLogger : FinalLogger

{

    // Error: cannot derive from sealed type 'FinalLogger'

}

Class that cannot be inherited by other classes is called sealed class. Purpose is restrict inheritance.

https://www.c-sharpcorner.com/article/sealed-class-in-C-Sharp/