private void combobox1_SelectionChanged_1(object sender, SelectionChangedEventArgs e) { listboxEmployeData.Items.Clear(); string title; title = combobox1.SelectedValue.ToString(); EmployeeViewModel[] employees = DataGateway.SelectEmployeesByTitle(title); foreach (EmployeeViewModel emp in employees) { listboxEmployeData.Items.Add(emp.FullName); } }