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From: LostWorld79
Message 15 in Discussion
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LostWorld79
Sealed Classes and Class Members (MSDN Extract)
Classes can be declared as sealed. This is accomplished by putting the keyword
sealed before the keyword class in the class definition. For example:
public sealed class D
{
// Class members here.
}
A sealed class cannot be used as a base class. For this reason, it cannot also
be an abstract class. Sealed classes are primarily used to prevent derivation.
Because they can never be used as a base class, some run-time optimizations can
make calling sealed class members slightly faster.
A class member, method, field, property, or event, on a derived class that is
overriding a virtual member of the base class can declare that member as
sealed. This negates the virtual aspect of the member for any further derived
class. This is accomplished by putting the sealed keyword before the override
keyword in the class member declaration. For example:
public class D
{
sealed override void MyMethod() {}
}
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