How to call ObjectContext.Refresh() when using ADO.NET Unit Testable Repository Generator

Question

I'm using “ADO.NET Unit Testable Repository Generator" (described here) to generate the entity classes. This T4 template automatically generates the following classes, apart from the classes for the database objects:

1. <MyEntities>.cs - The functional concrete object context
2. <MyEntities>BaseRepositoryTest.cs
3. <MyEntities>Mock.cs - The concrete mock context object that implements the context's interface.
4. <MyEntities>Mock.ObjectSet.cs
5. <MyModelRepository>.Context.cs
6. <MyEntities>PartialRespository.cs
7. I<MyEntities>.cs - The interface for the specialised object context.

I am not completely sure what some of these classes are for.

I am using a manager class that performs all database access/update operations.

// Contains all Methods that access the database 
public class DataManager
{
    private IMyEntities _context;

    public DataManager()
        : this(new MyEntities())
    {
    }

    public bool AddOrder(Order order)
    {
      _context.Orders.AddObject(order);
      _context.SaveChanges();
    }
  ...
  }

i want to check for concurrency exceptions when I call _context.SaveChanges(). Ideally, I would like to call _context.Refresh() in case of a concurrency issue. However, the autogenerated ObjectContext class IMyEntities does have a method like ObjectContext.Refresh()

What am I doing wrong? How can I call Refresh()?

Answer 1

AFAIK this can't be done since IMyEntities does not inherit ObjectContext. But MyEntities does.

When I change

private IMyEntities _context;

to

private MyEntities _context;

I can call ObjectContext.Refresh() using _context.Refresh().