sealed keyword c sharp

sealed 

The sealed modifier can be applied to classes, instance methods and properties. A sealed class cannot be inherited. A sealed method overrides a method in a base class, but itself cannot be overridden further in any derived class. When applied to a method or property, the sealed modifier must always be used with override 

It is an error to use a sealed class as a base class or to use the abstract modifier with a sealed class.

Structs are implicitly sealed; therefore, they cannot be inherited

Example

---

sealed class SealedClass

{

    public int x;

    public int y;

}

class SealedTest2

{

    static void Main()

    {

        SealedClass sc = new SealedClass();

        sc.x = 110;

        sc.y = 150;

        Console.WriteLine("x = {0}, y = {1}", sc.x, sc.y);

    }

}

// Output: x = 110, y = 150