public List <Prescription> GetPrescriptionsForPatient(int patientID)
        {
            List <Prescription> prescriptionsForPatient = new List <Prescription>();

            foreach (Prescription prescription in prescriptionRepository.GetAllEntities().ToList())
            {
                if (prescription.MedicalExamination.PatientId == patientID)
                {
                    prescriptionsForPatient.Add(prescription);
                }
            }
            return(prescriptionsForPatient);
        }