A sealed property overrides a property in a base class, but itself cannot be overridden further in any derived class. Is it true?

Question

Hi Friends,

In an unauthetic study material about C# I found the statement as mentioned in subject is it true?

Answer 1

yes: http://msdn.microsoft.com/en-us/library/88c54tsw.aspx

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My blog: blog.jessehouwing.nl

Answer 2

Yes. Actually the statement should be :

"A sealed property can overridea property in a base class, but itself cannot be overridden further in any derived class"

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Please mark this post as answer if it solved your problem. Happy Programming!

Answer 3

True, the simple statement "a sealed property cannot be overriden" should be sufficient, it doesn't imply a sealed property cannot override an other.

Dorian

Answer 4

Hi Ajay,

Please see this below sample:

class One
    {
        protected virtual void F() { Console.WriteLine("One.F"); }
        protected virtual void F2() { Console.WriteLine("One.F2"); }
    }
    class Two : One
    {
        sealed protected override void F() { Console.WriteLine("Two.F"); }
        protected override void F2() { Console.WriteLine("One.F3"); }
    }
    class Three : Two
    {
        // Attempting to override F causes compiler error CS0239.
        // protected override void F() { Console.WriteLine("Three.F"); }

        // Overriding F2 is allowed.
        protected override void F2() { Console.WriteLine("Three.F2"); }
    }

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Regards, http://shwetamannjain.blogspot.com

Answer 5

Actually, a sealed property must override an inherited property. If it doesn't override anything, you don't need to seal it.