EF: Allows usual transactions for scope injected instances and a factory method to create contexts which are disposed of by the caller

DI Config for a DbContext Factory

  services.AddDbContext<MyDataContext>(
      o => o.UseSqlServer(settings.ConnectionString),
      ServiceLifetime.Scoped,
      ServiceLifetime.Singleton);
  services.TryAddSingleton<Func<MyDataContext>>(sp =>
      () => new MyDataContext(sp.GetService<DbContextOptions<MyDataContext>>())
  );