public string Delete(ElectricityConsumer obj, IDBContextElectricityConsumer db)
 {
     db.ElectricityConsumers.Remove(obj);
     db.SaveChanges();
     return("Deleted successfully");
 }
 public string Save(ElectricityConsumer obj, IDBContextElectricityConsumer db)
 {
     db.ElectricityConsumers.Add(obj);
     db.SaveChanges();
     return("Saved successfully");
 }