Table of Contents 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Notes DownloadECMA-334 C# Language Specification


17 Classes
17.1 Class declarations
17.1.1 Class modifiers
17.1.1.2 Sealed classes
Paragraph 11 The sealed modifier is used to prevent derivation from a class. 2 A compile-time error occurs if a sealed class is specified as the base class of another class.
Paragraph 21 A sealed class cannot also be an abstract class. [Note: The sealed modifier is primarily used to prevent unintended derivation, but it also enables certain run-time optimizations. In particular, because a sealed class is known to never have any derived classes, it is possible to transform virtual function member invocations on sealed class instances into non-virtual invocations. end note] |
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