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);
}
}