Why aren't classes sealed by default?

Question

I was just wondering, since the sealed keyword\'s existence indicates that it\'s the class author\'s decision as to whether other classes are allowed to inh

Answer 1

In my opinion there should be no default syntax, that way you always write explicitly what you want. This forces the coder to understand/think more.

If you want a class to be inheritable then you write

public extensible class MyClass

otherwise

public sealed class MyClass

BTW I think the same should go with access modifiers, disallow default access modifiers.