1. David Giard MCTS, MCSD, MCSE, MCDBA Principal Consultant, Sogeti www.DavidGiard.com DavidGiard@DavidGiard.com

2. Managed Extensibility Framework Beta 2

3. Compile and Deploy Tight Coupling DLL DLL EXE

4. MEF Loose Coupling with mef Compile and Deploy DLL DLL EXE DLL Contract Contract Contract Contract

5. Managed Extensibility Framework Applications consists of loosely-coupled components that are discovered and composed at runtime

6. Advantages of mef Loose Coupling Swap Classes at Runtime No Recompile or Redeploy Single Plug-In Architecture

7. MEF Usage Scenarios Empower developers to extend your application without modifying it Provide extra modules to your application, as needed Use MEF as an platform ecosystem to manage all parts of your application

8. Demo G/L Modules for Accounting app A/R MEFApp (Accounting) GenSetup A/P Export

9. Existing Extensibility in .Net Visual Studio Add-Ins Microsoft Tools for Office Rules Engines WCF Interfaces Reflection IOC / Dependency Injection

10. Get Started MEF.CodePlex.com Download and unzip MEF_Beta_2.zip Zip file contains DLLs Samples Source Code

11. Developer Steps Set Reference to System.ComponentModel.Composition.dll Contract Import Export Catalogs Composition Import Contracts Export

12. MEF Contracts [Import(“Contract1”)] String SomeThing {get; set;} [Export(“Contract1”)] Public string SpecialThing{ Get {return “A Value”}; } “A Value”

13. MEF Contracts [Import(“Contract1”)] String SomeThing {get; set;} [Export(“Contract1”)] Public string MoreSpecialThing{ Get {return “A Different Value”}; } “A Different Value”

14. MEF Interface Contracts [Import(typeof(IFoo))] IFooSomeFoo {get; set;} [Export(typeof(IFoo))] public Foo: IFoo{ … } new Foo()

15. MEF Interface Contracts [Export(typeof(IFoo))] public Foo1: IFoo{ … } [ImportMany(typeof(IFoo))] List<IFoo> BunchOfFoos{get; set;} new Foo1() [Export(typeof(IFoo))] public Foo2: IFoo{ … } new Foo2()

16. Composition varcatalog1 = newDirectoryCatalog(@"c:EFmports"); var container = newCompositionContainer catalog1); container.ComposeParts(this); Catalogs TypeCatalog AssemblyCatalog DirectoryCatalog AggregateCatalog PackageCatalog (Silverlight toolkit)

17. Demo Using MEF

18. MEF vs Dependency Injection

19. rESOURCES http://MEF.codeplex.com http://www.davidgiard.com http://msmvps.com/blogs/kathleen http://blogs.msdn.com/gblock http://tinyurl.com/TaultyMEFSilverlightVideos NPlus1.org David Giard, MCTS, MCSD, MCSE, MCDBA www.DavidGiard.com DavidGiard@DavidGiard.com

20. User Groups Great Lakes Area .Net User Group Southfield, MI migang.org Greater Lansing .Net User Group East Lansing, MI glugnet.org

21. Dave’s Thoughts DavidGiard.com TechnologyAndFriends.com DavidGiard@DavidGiard.com