private void AddEmployeeToListView(Employee employee)
        {
            ListViewItem listViewItem = new ListViewItem(employee.Id.ToString());
            listViewItem.SubItems.Add(employee.FirstName);
            listViewItem.SubItems.Add(employee.LastName);
            listViewItem.SubItems.Add(employee.HireDate.ToString());

            employeesListView.Items.Add(listViewItem);
        }
 private void SetupEmployee(Employee employee)
 {
     employee.FirstName = "Test";
     employee.LastName = "Test";
 }