How to convert sample project using EF4, ObjectContext -- to EF5 DBcontext?

Question

I have been working with (wrestling with) trying to create a copy a small sample project -- that is actually 3 project -- a class library containing an ADO.Net Entity Data Model (EF4) which uses ObjectContext, a WCF service application project (that
connects to the Entity Data Model), and a WPF client which consumes the (data?).  This sample was created in VS2010.  I am trying to create a copy of this sample project in VS2012 (with EF5 and DBContext). The VS2010 sample works fine.  A .zip
of the sample project (the sample I'm working on -- which I have removed a few additional projects that were included in the original sample project) can be downloaded
here
The .zip also contains the sample database (called SkiResultDB, mdf & ldf -- which I recreated the sample database from the original because the name was too long and had too many periods in the original -- but hey, everything still works in
this sample). 
The sample project also uses
[assembly: EdmSchemaAttribute()]
attribute in the .edmx ...Designer.cs
  It looks like this:
[assembly: EdmSchemaAttribute()]
#region EDM Relationship Metadata
[assembly: EdmRelationshipAttribute("myDataBindingModel", "FK_Competitor_Event", "Event", System.Data.Metadata.Edm.RelationshipMultiplicity.One, typeof(SkiResult.Data.Event), "Competitor", System.Data.Metadata.Edm.RelationshipMultiplicity.Many, typeof(SkiResult.Data.Competitor), true)]
#endregion
"myDataBindingModel" is used 25 times through the designer.cs and the .edmx xml file (I renamed that bindingModel to myDataBindingModel -- to see if it would still work, and it did).
here is what the designer.cs looks like (at a glance)
When I try to create an ADO.Net Entity Data Model from the template list -- I just get bare bones --   ... : DBContext and none of the stuff that the original .edmx ... Designer.cs had.  But in the EF5 entity data model I do get
...edmx...context.tt which contains ...context.cs, but does not contain any of the methods in the original .edmx. 
My request is if someone could explain -- just the class library part of this sample project for now -- how I could create an ADO.Net Entity Data Model like the original but in VS2012 (EF5) which does everything that the original ADO.Net Entity
Data model does, the attribute decorators (did the author do that -- or was that generated by VS2010 or some other tool?).  Note:  I got this sample project from
http://www.software-architects.com/devblog/2010/09/10/MVVM-Tutorial-from-Start-to-Finish
which includes 8 (short) videos, very concise tutorial (the original sample project also included a Silverlight client and a unit test -- which I removed for simplicity  from my sample).  In the first video, the author specifically states
that THIS tutorial is not about entity framework and thus did not explain much.  The first video just shows him selecting an ADO.Net Entity Data Model from the template collection and just clicking on the wizard.  I suspect that Entity
framework was the "Fundamental" part of this sample project. 
Any Suggestions appreciated.
Rich P

Answer 1

Hello Rich ,
>>My request is if someone could explain -- just the class library part of this sample project for now…
With the release  of the Entity Framework 5, the team uses the DbContext API installed of ObjectContext and the DbContext is recommended. In your case, since the project already uses the ObjectContext, I think it might be not easy to change
it to work with the DbContext, you could follow steps as below to make the project still work with the ObjectContext AP:
1. It still needs you to create the ADO.Net Entity Data Model in VS2012
2. After you created the model, delete the XXX.Context.tt and XXX.tt files, they are used to work with the DbContext.
3. In the designer windows, right click and select the properties, change Code Generation Strategy to Default/Legacy Object Context and save the designer windows.
It would generate the entities are similar with the one you show in the image.
Regards.
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