public FileContentResult GetImg(int Id)
 {
     using (var db = new Taller_Mecanico2Entities()) {
         byte[] byteArray = db.Evidencias.Find(Id).foto;
         if (byteArray != null)
         {
             return(new FileContentResult(byteArray, "image/jpg"));
         }
         else
         {
             return(null);
         }
     }
 }