June 18, 2002 - Changing the Base Class Members | WebReference

June 18, 2002 - Changing the Base Class Members

Yehuda Shiran June 18, 2002
Changing the Base Class Members
Tips: June 2002

Yehuda Shiran, Ph.D.
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When a new class inherits from a base class, it gets all the base's members. You cannot get rid of these members. You can do one of the three: accept, hide, or override them. The default is to accept them. You accept them by refraining from their redefinition in the derived class. Simply put, do not define a derived class's member with the same name as a base class's member. When you do redefine a base member, you override the base class's member by default. This is how you override a base class. You can reflect this overriding by adding override to the member definition, as we have shown in Column 110. When you override a member, the behavior of both base objects and derived objects change. They all sport the new behavior. When you want to change the behavior of derived objects and keep the original behavior of base objects, mark your derived members with hide. The base members are hidden from the derived members (with the same name, of course). We have covered how to use the hide modifier in Column 110.

To learn more about JScript .NET, go to Column 110, JScript .NET, Part IV: Inheritance.