private void cbxPercentage_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
if (this.IsLoaded)
{
String zoomString = (String)cbxPercentage.SelectedItem;
double currentZoom = Double.Parse(zoomString.Replace("%", ""));
Map1.ZoomToScale(PrinterHelper.GetPointsPerGeographyUnit(Map1.MapUnit) / (currentZoom / 100));
Map1.Refresh();
}
}