private void Form1_Load(object sender, EventArgs e) { EventBD = new EventTransaction(50, 50, 60, 330, this); ThemeBD = new ThematicTransaction(50, 50, 60, 330, this); CongratulationBD = new CongratulationTransaction(50, 50, 300, 330, this); //Fill ListofEvents ListofEvents = Event.Fill(); //Fill ListOfThematics ListofThematics = Theme.Fill(); //Fill ListOfCongratulations ListOfCongratulations = Congratulation.Fill(); //First select when form has alreadde loaded EventBD.Select(ListofEvents, EventBD); }