//add new disease info
 public void POST(disease_information disease)
 {
     using (ThyroidDataEntities entities = new ThyroidDataEntities())
     {
         entities.disease_information.Add(disease);
         entities.SaveChanges();
     }
 }
 //delete disease info
 public string Delete(string id)
 {
     using (ThyroidDataEntities entities = new ThyroidDataEntities())
     {
         disease_information disease = entities.disease_information.Find(id);
         entities.disease_information.Remove(disease);
         entities.SaveChanges();
         return("Deleted Successfully");
     }
 }
        //update disease info
        public void PUT(string id, disease_information diseaseinfo)
        {
            using (ThyroidDataEntities entities = new ThyroidDataEntities())
            {
                var diseasename = entities.disease_information.Find(id);
                diseasename.thumbnail       = diseaseinfo.thumbnail;
                diseasename.description     = diseaseinfo.description;
                diseasename.disease_content = diseaseinfo.disease_content;
                diseasename.symptom         = diseaseinfo.symptom;
                diseasename.cause           = diseaseinfo.cause;
                diseasename.treatment       = diseaseinfo.treatment;
                diseasename.timestamp       = diseaseinfo.timestamp;

                entities.Entry(diseasename).State = System.Data.Entity.EntityState.Modified;
                entities.SaveChanges();
            }
        }