public IActionResult AddDisease(Disease disease)
{
var name = _db.GetDiseases().FindAll(a => a.Name == disease.Name).Count();
if (name == 0)
{
if (ModelState.IsValid)
{
_db.AddDisease(disease);
return(RedirectToAction(nameof(GetDisease)));
}
}
ViewBag.Message = "already exists";
return(View());
}