.NET Design Patterns in C# and VB.NET - Gang of Four (GOF) - doFactory.com. Design patterns are solutions to software design problems you find again and again in real-world application development.
Patterns are about reusable designs and interactions of objects. The 23 Gang of Four (GoF) patterns are generally considered the foundation for all other patterns. They are categorized in three groups: Creational, Structural, and Behavioral (for a complete list see below). To give you a head start, the C# source code for each pattern is provided in 2 forms: structural and real-world. Structural code uses type names as defined in the pattern definition and UML diagrams. Cheat Sheet : All Cheat Sheets in one page.
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