private void HandleButtonRepairEquipmentClicked(object sender, UserInterfaceEquipmentEventArgs e)
 {
     EventHelper.FireEvent(EquipmentRepaired, sender, e);
 }
 private void HandleButtonSellEquipmentClicked(object sender, UserInterfaceEquipmentEventArgs e)
 {
     EventHelper.FireEvent(EquipmentSold, sender, e);
     ChangeState(UserInterfaceState.Default);
 }