Creating extensible application
using MEF
@Ben_Hall
Ben@BenHall.me.uk
Blog.BenHall.me.uk

Agenda
• MEF ABCs
• Extensibility in .Net 2.0
• Extensibility with MEF
• MEF Internally

Managed Extensibility
Framework

Internal and External

MS-PL

[Export]
I have something to offer

[Import]
I need something

Catalog
I know about some exports

Container
I know about everything

DEMO
HELLO WORLD

DEMO
LIFE IN 2.0

DEMO
LIFE WITH MEF

DEMO
BEYOND 3RD PARTY ADDINS

DEMO
BEING SELECTIVE

Visual Studio 2010

In summary...

Summary
• Need to compose parent for child imports to
be populated
• Allows externals to hook-in
• Allows internals to be decoupled
• Override your built in defaults
• Part of .Net 4.0
• Available today from Codeplex

Thank you
Ben Hall
Ben@BenHall.me.uk
Blog.BenHall.me.uk

Resources
• http://blog.BenHall.me.uk
• http://www.codeplex.com/mef
• http://blogs.msdn.com/gblock

Flickr Images
• http://www.flickr.com/photos/m0php/530526644/
• http://www.flickr.com/photos/dunechaser/2918021
174/
• http://www.flickr.com/photos/mag3737/191407627
7/
• http://www.flickr.com/photos/25501212@N05/2934
269081/
• http://www.flickr.com/photos/zen/2273186263/
• http://www.flickr.com/photos/leon_homan/2856628
778/