Full Name:
sealed

Short Name:
sealed

Type of Entity:
C#

Abstract:
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 (C# Reference).

MSDN Source URL:
http://msdn2.microsoft.com/88c54tsw.aspx