namespace CustomControllerFactory.App_Start {
    public static class RazorGeneratorMvcStart {
        public static void Start() {
  .....
 ControllerBuilder.Current.SetControllerFactory(new CustomControllerFactory());
  .....
}

public Controller(DataManager dataManager)
		{
			_dataManager = dataManager;
		}

public class DataManager
	{
		private ModelDataContextWrapper _dataContext;
		public DataManager()
		{
			_dataContext = new ModelDataContextWrapper();
		}

private UserRepository _userRepository;
		public UserRepository Users 
		{
			get 
			{
				if (null == _userRepository)
					_userRepository = new UserRepository(_dataContext);

				return _userRepository;
			}
		}