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  1/30/2015 Tutorial: Common Design Patterns in C# 4.0 - Home 1/2 Tutorial: Common Design Patterns in C# 4.0 Design Patterns provide standardized and efficient solutions to software design and programming problems thatare re‐usable in your code. Software Architects and developers use them to build high quality robustapplications.However, you have to take care to select the right pattern for the right problem. If you need to modify the initialpattern too much, this may indicate that it is not adapted to your needs and may in the worst case lead tounmaintainable, complex and inefficient code. The opposite of what you intend when using Design Patterns !!You may also create your own custom Design Patterns. Whenever you come up with a certain solution that isreusable in a vast majority of your projects, you may decide to abstract a design pattern out of it. Then you maycreate your own library of patterns and share them within your whole company, thus creating standards andameliorating maintainability.I am going to show you how to use the well known Gang of Four GoF   Design Patterns in C# 4.0 code. Thosepatterns will work well in any project that uses C# but especially in WPF, WCF, WinForms, ASP.NET projects.The GoF Design Patterns are divided into 3 categories : Creational Patterns, Structural Patterns and BehavioralPatterns. I am going to explain each GoF Design Pattern in detail and will show you examples of how to writegood C# 4.0 code that implement those patterns. Creational Patterns Abstract Factory Pattern:  Create instances of classes belonging to different families Builder Pattern:  Separate representation and object construction Factory Method Pattern:  Create instances of derived classes Prototype Pattern:  Clone or copy initialized instances Singleton Pattern:  Class with only one single possible instance Structural Patterns Adapter Pattern:  Match interfaces of classes with different interfaces Bridge Pattern::  Separate implementation and object interfaces Composite:  Simple and composite objects tree Decorator:  Dynamically add responsibilities to objects Facade:  Class that represents subclasses and subsystems Flyweight:  Minimize memory usage by sharing as much data as possible with similar objects Proxy:  Object that represents another object Behavioral Patterns Chain of Responsibility:  Pass requests between command and processing objects within a chain of objects Command:  Encapsulate a method call as an object containing all necessary information Interpreter:  Include language elements and evaluate sentences in a given language Iterator:  Give sequential access to elements in a collection Mediator:  Encapsulates and simplifies communication between objects Memento:  Undo modifications and restore an object to its initial state Observer:  Notify dependent objects of state changes State:  Change object behavior depending on its state Strategy:  Encapsulate algorithms within a class and make them interchangeable Template Method:  Define an algorithm skeleton and delegate algorithm steps to subclasses so that theymay be overridden Visitor:  Add new operations to classes without modifying them Code Plex Project Hosting for Open Source Software RegisterSign In Search all projects   Tutorial: Common Design Patterns in C# 4.0 HOMESOURCE CODEDOWNLOADSDOCUMENTATIONDISCUSSIONSISSUESPEOPLELICENSEPage InfoChange History all pages   Follow 191   Subscribe Search Wiki & Documentation There is no recommended release for this project. ACTIVITY PAGE   VIEWS VISITS DOWNLOADS 0026Days:730AllDetails  1/30/2015 Tutorial: Common Design Patterns in C# 4.0 - Home 2/2 There are also many other types of patterns such as: Parallel Patterns, SOA Patterns, Enterprise ArchitecturePatterns, etc… So if you work in the respective area don’t hesitate to look up patterns that may help you to bemore efficient and build better applications. Find further explications and a more detailed step‐by‐step guide on my Blog: http://www.jasondeoliveira.comLast edited Apr 24, 2014 at 10:01 AM by JasonOliveira, version 18© 2006‐2015 MicrosoftGet HelpPrivacy StatementTerms of UseCode of ConductAdvertise With UsVersion 12.4.2014.20959
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