Answer / umesh

Yes, that?s what keyword sealed in the class definition is
for. The developer trying to derive from your class will get
a message: cannot inherit from Sealed class
WhateverBaseClassName. It?s the same concept as final class
in Java.

Answer / neerajtyagi

You can prevent your class being derived using sealed
keyword.

But you can't use that class as base class once you make
that sealed.

Sealed and Derived both are opposite.

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