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Object-oriented Programming in C#
Specialization, Extension, and Inheritance
Specialization of Classes

Classes are regarded as types, and specializations as subtypes

Specialization facilitates definition of new classes from existing classes on a sound conceptual basis


The class B is a specialization of class A

If a class B is a specialization of a class A then

  • The instances of B is a subset of the instances of A
  • Operations and variables in A are also present in B
  • Some operations from A may be redefined in B