Abstract classes, Interfaces, and Patterns

A complete PDF version of the text book is now available. The PDF version is an almost complete subset of the HTML version (where only a few, long program listings have been removed). See here.

Page 1	Method Combination	Page 20	The Composite design pattern
Page 2	Method Combination	Page 21	A Composite Example: Music Elements
Page 3	Parameter Variance	Page 22	An application of Music Elements
Page 4	Covariance and Contravariance	Page 23	Implementation of MusicElement classes
Page 5	Abstract Classes - Sealed Classes	Page 24	A Composite example: IntSequence
Page 6	Abstract Classes	Page 25	A Composite example: IntSequence application
Page 7	Abstract classes and abstract methods in C#	Page 26	Implementation of the IntSequence classes
Page 8	Abstract Properties	Page 27	A Composite Example: A GUI
Page 9	Sealed Classes and Sealed Methods	Page 28	A Composite Example: A GUI
Page 10	Interfaces	Page 29	A Composite Example: A GUI
Page 11	Interfaces	Page 30	Cloning
Page 12	Interfaces in C#	Page 31	Cloning in C#
Page 13	Examples of Interfaces	Page 32	The fragile base class problem
Page 14	Interfaces from the C# Libraries	Page 33	The Visitor design pattern
Page 15	Sample use of IComparable	Page 34	Natural object-oriented IntSequence traversals
Page 16	Sample use of IEnumerator and IEnumerable	Page 35	Towards a Visitor solution
Page 17	Sample use of IFormattable	Page 36	A Visitor example: IntSequence
Page 18	Explicit Interface Member Implementations	Page 37	Visitors - Pros and Cons
Page 19	Patterns and Techniques