private void button5_Click(object sender, EventArgs e)
        {
            string ownerName    = estateOwnerName.Text;
            string estateToJoin = estateSelection.SelectedItem.ToString();

            _regionManager.ChangeEstate(ownerName, estateToJoin, _CurrentEstateRegionSelectedID);
            UpdateCurrentEstateText(estateToJoin);
            if ((RegionHasBeenCreated && RegionCreatedID == _CurrentEstateRegionSelectedID) ||
                _pageToStart == RegionManagerPage.EstateSetup)
            {
                StartRegionAfterEstateCreation();
            }
        }