public void Add(Person person)
 {
     using (var context = new MyDBDataContext(_connectionString))
     {
         context.Persons.InsertOnSubmit(person);
         context.SubmitChanges();
     }
 }
 public void EditPerson(Person person)
 {
     using (var context = new MyDBDataContext(_connectionString))
     {
         context.Persons.Attach(person);
         context.Refresh(System.Data.Linq.RefreshMode.KeepCurrentValues, person);
         context.SubmitChanges();
     }
 }