I am using generic unity of work for EF6 from here:
<https://genericunitofworkandrepositories.codeplex.com/>

I have an application which uses two databases. I've created additional UnitOfWork interface and class that implements original unit of work interface:

```
namespace Repository.Pattern.UnitOfWork
{
    public interface ILotteryBackOfficeUnitOfWorkAsync : IUnitOfWorkAsync
    {
    }
}

```

Second unit of work type for second database initialization:

```
namespace Repository.Pattern.Ef6
{
    public class LotteryBackOfficeUnitOfWork : UnitOfWork, ILotteryBackOfficeUnitOfWorkAsync
    {
        public LotteryBackOfficeUnitOfWork(IDataContextAsync dataContext)
            : base(dataContext)
        { }
    }
}

```

In unity I register both unit of works for different data contexts:

```
public static void RegisterTypes(IUnityContainer container)
{
    // NOTE: To load from web.config uncomment the line below. Make sure to add a Microsoft.Practices.Unity.Configuration to the using statements.
    // container.LoadConfiguration();

    // TODO: Register your types here
    // container.RegisterType<IProductRepository, ProductRepository>();

    var purusLotteryConnectionString = WebConfigurationManager.ConnectionStrings["PurusLotteryContext"].ConnectionString;
    var purusLotteryBackOfficeConnectionString = WebConfigurationManager.ConnectionStrings["PurusLotteryBackOfficeContext"].ConnectionString;

    container.RegisterType<IDataContextAsync, PurusLotteryContext>(new InjectionConstructor(purusLotteryConnectionString));
    container.RegisterType<IUnitOfWorkAsync, UnitOfWork>(new HierarchicalLifetimeManager());

    container.RegisterType<IDataContextAsync, PurusLotteryBackOfficeContext>("LotteryBackOfficeContext", new InjectionConstructor(purusLotteryBackOfficeConnectionString));
    container.RegisterType<ILotteryBackOfficeUnitOfWorkAsync, LotteryBackOfficeUnitOfWork>(new HierarchicalLifetimeManager(),
        new InjectionConstructor(container.Resolve<IDataContextAsync>("LotteryBackOfficeContext")));

    container.RegisterType<IHomeService, HomeService>();
}

```

It works, but is this correct procedure?