void showGroupingUnitsByAreas()
{
MgHostingUnitsList = new List <HostingUnit>();
foreach (var item in bL.GroupHostingUnitByRegion())
{
foreach (var value in item)
{
MgHostingUnitsList.Add(value);
}
}
this.ManagerZone.dataGrid.ItemsSource = MgHostingUnitsList;
}