public CoachingProcess CheckCoachRemovedOfCoachingProcess(List <Coach> listCoachingProcess, CoachingProcess coachingProcess)
        {
            var oldList = _repository.GetAllByCoachingProcess(coachingProcess.Id);

            foreach (var coach in oldList)
            {
                if (!listCoachingProcess.Contains(coach))
                {
                    coachingProcess.RemoveCoach(coach);
                }
            }
            foreach (var coach in listCoachingProcess)
            {
                coachingProcess.AddCoach(coach);
            }

            return(coachingProcess);
        }