1) Convention over Configuration is a software design paradigm that seeks to decrease the number of decisions developers need to make by introducing conventions or standard ways of doing things. This gains simplicity without necessarily losing flexibility. 2) In .NET, configuration was historically used for many things like settings, but this led to problems like "XML Hell" with too much configuration. 3) .NET 4.0 and other frameworks are embracing conventions over configuration, by standardizing naming, structure, and other conventions to remove the need for extensive configuration files and code.

2. Application Architect

4. Availableconfigurationoptions Hard coded settings Ini files Registry XML … 3

5. Hardcoded 4

6. .ini Files 5

7. Windows Registry 6

8. XML Files 7

9. Lots of XML 8

10. XML Hell 9

11. The problem Toomuchconfiguration is killingproductivity 10

12. .NET historically configuration-based Configuration-Based

13. Solution Convention over Configuration 12

14. What’s a convention? “A convention is a set of agreed, stipulated or generally accepted standards, norms, social norms or criteria, often taking the form of a custom.” - Wikipedia 13

15. What’s a convention? “Convention over Configuration is a software design paradigm which seeks to decrease the number of decisions that developers need to make, gaining simplicity, but not necessarily losing flexibility. The phrase essentially means a developer only needs to specify unconventional aspects of the application.” -Wikipedia 14

16. You’veusedconventionsbefore Namingconventions Codingconventions … 15

17. Convention over Configuration Byintroducing a simple set of conventions, youcandrasticallyreduce the amount of work Youloose a little bit of flexibility 16

18. Convention over configuration 17

19. Conventions are finally finding it’s way into mainstream .NET development Conventions in .NET

20. Conventions in .NET DataSet & DataTable Conventionthattable name matches table and column name matches column Allows easy data-access ASP.NET MVC Entity FW Nhibernate AutoMapper EntLib 5.0 Caliburn Ayende Sample(?) … 19

21. DEMO 1 – ASP.NET MVC

22. DEMO 2 – ENTITY FRAMEWORK 4.0

23. DEMO 3 – ENTERPRISE LIBRARY 5.0

24. DEMO 4 – Windows Communication Foundation 4.0

25. Next steps Have a look at yourownapplications Try to findcommonconfigurationpatterns Agreeaboutsomeconventions Implementthem! 24

26. THANK YOU ! 25