如何避免在C＃中继承类？

Question

In java, I could do this with the 'final' keyword. I don't see 'final' in C#. Is there a substitute?

Answer 1

You're looking for the sealed keyword. It does exactly what the final keyword in Java does. Attempts to inherit will result in a compilation error.

Answer 2

Also be aware that "I don't think anybody will ever need to inherit from this" is not a good reason to use "sealed". Unless you've got a specific need to ensure that a particular implementation is used, leave the class unsealed.

Answer 3

As Joel already advised, you can use sealed instead of final in C#.

http://en.csharp-online.net/CSharp_FAQ:_Does_CSharp_support_final_classes

Answer 4

The sealed modifier will do what final does in Java.

Also, although this probably isn't what you're looking for in this situation, marking a class as static also keeps it from being inherited (it becomes sealed behind the scenes).

Answer 5

sealed关键字可以使用，但是仍然可以使用反射IIRC从该类派生。