Entity Framework 5 Updating a Record

Question

I have been exploring different methods of editing/updating a record within Entity Framework 5 in an ASP.NET MVC3 environment, but so far none of them tick all of the boxes

Answer 1

public interface IRepository
{
    void Update(T obj, params Expression>[] propertiesToUpdate) where T : class;
}

public class Repository : DbContext, IRepository
{
    public void Update(T obj, params Expression>[] propertiesToUpdate) where T : class
    {
        Set().Attach(obj);
        propertiesToUpdate.ToList().ForEach(p => Entry(obj).Property(p).IsModified = true);
        SaveChanges();
    }
}