Modules Implementation

Controllers\ExampleController.cs

namespace Project.Controllers 
{
  public class ExampleController : ModuleController 
  { 
    public JsonResult GetUser(Guid userId)
    {
      UserModel user = Modules.UserLogic.Get(userId);
      return Json(user, JsonRequestBehavior.AllowGet);
    }
  }
}

Controllers\ModuleController.cs

using Project.Logic;

namespace Project.Controllers 
{
  public abstract class ModuleController : Controller 
  { 
    protected Modules Modules { get; } = Modules.New();
    
    public override void Dispose() { 
      base.Dispose();
      Modules.Dispose();
    }
  }
}

Logic\Modules.cs

using Project.Data; // enternal dependency

namespace Project.Logic 
{
  public class Modules : IDisposable
  {
    private readonly Entities _entities;
    private readonly User _userLogic;
    
    internal static Modules New() 
    {
      return new Modules(new Entities());
    }
    
    private Modules(Entities entities)
    {
      _entities = entities;
      _userLogic = User.New(_entities);
    }
    
    public User UserLogic { get; } = _userLogic
    
    public override void Dispose() { 
      _entities.Dispose();
    }
  }
}

Logic\User.cs

using Project.Data; // enternal dependency

namespace Project.Logic 
{
  public class User 
  {
    private readonly Entities _entities;
  
    internal static User New(Entities entities) 
    {
      return new User(entities);
    }
    
    private User(Entities entities)
    {
      _entities = entities;
    }
    
    public UserModel Get(Guid userId) 
    {
      User user = entities.Users.Find(userId);
      // ... transform to UserModel
      return userModel
    }

    // public List<UserModel> Get(Func<Data.User, bool> predicate = null) ... + other methods
  }
}