问Entity Framework4 "Unit of Work“模式是通用存储库的首选吗？

EN

public interface IRepository<T>
{
    //Retrieves list of items in table
    IQueryable<T> List();
    IQueryable<T> List(params string[] includes);
    //Creates from detached item
    void Create(T item);
    void Delete(int id);
    T Get(int id);
    T Get(int id, params string[] includes);
    void SaveChanges();
}

public class Repository<T> : IRepository<T> where T : EntityObject
{
    private ObjectContext _ctx;

    public Repository(ObjectContext ctx)
    {
        _ctx = ctx;
    }


    private static string EntitySetName
    {
        get
        {
            return String.Format(@"{0}Set", typeof(T).Name);
        }
    }

    private ObjectQuery<T> ObjectQueryList()
    {
        var list = _ctx.CreateQuery<T>(EntitySetName);
        return list;
    }

    #region IRepository<T> Members

    public IQueryable<T> List()
    {
        return ObjectQueryList().OrderBy(@"it.ID").AsQueryable();
    }

    public IQueryable<T> List(params string[] includes)
    {
        var list = ObjectQueryList();

        foreach(string include in includes)
        {
            list = list.Include(include);
        }

        return list;
    }

    public void Create(T item)
    {
        _ctx.AddObject(EntitySetName, item);
    }

    public void Delete(int id)
    {
        var item = Get(id);
        _ctx.DeleteObject(item);
    }

    public T Get(int id)
    {
        var list = ObjectQueryList();
        return list.Where("ID = @0", id).First();
    }

    public T Get(int id, params string[] includes)
    {
        var list = List(includes);
        return list.Where("ID = @0", id).First();
    }

    public void SaveChanges()
    {
        _ctx.SaveChanges();
    }

    #endregion

}