c# - Adding an older version of EF to a project -

I have an old C # Silverlight 5 app (in Visual Studio 2012) which has some data access using EF5 There are projects. Seeing them, I look at just one ADMX and when I look at the solution explorer and increase it, I see the designer CC file. Expanding It I can see all the institutions. Nuget EF 5.0.0 shows attached to the project. Looking at the actual context, I see Runtime version v4.0.30319, version 4.4.0.0.

Now, updating EF is not a possibility (too much is at stake), but when I add a new item 'ado. Net Entity Data Model ', I see what appears to be EF 6 items (context .tt, designer CC, ADMX deagaama, .tttttttttttttt). Despite this, it is not similar to other existing data access projects that use EF.

Is just adding an ADMX and designer CS files (similar to the original EF content) in a different way? Please tell me if you need any additional explanation!

Thank you!