June 2008
Intermediate to advanced
784 pages
20h 36m
English
Content preview from Programming Microsoft® Visual C#® 2008: The LanguageBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Sealed Classes
Sealed classes are the reverse of abstract classes. While abstract classes are inherited and refined in the derived type, sealed classes cannot be inherited. A sealed class cannot be refined any further. An abstract class is "abstract" (which perhaps goes without saying), while a sealed class is concrete. You can create instances of a sealed class. Sealed classes are terminating nodes in a class hierarchy, while an abstract class is typically near the top of a class hierarchy. A sealed class is used to prevent further refinement through inheritance. For example, I am a developer of a class library. Some of the classes in the class library are extensible. However, other classes are intended to be used "as is." Those classes are marked ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.