public AddOrEditLessonForm(DBManager aDBManager, int aID) { InitializeComponent(); mFormState = FormState.Editing; mDBManager = aDBManager; mID = aID; this.Text = FormTitles.LessonForm.Edit; foreach (var l in mDBManager.Lessons) { if (l.ID == aID) { mLesson = l; break; } } addDefaultControlsInformationWhenEditing(); }