private void ProjectButton_Click(object sender, System.Windows.RoutedEventArgs e)
{
double x = double.NaN;
double y = double.NaN;
double.TryParse(XTextBox.Text, out x);
double.TryParse(YTextBox.Text, out y);
if (double.IsNaN(x) || double.IsNaN(y))
{
MessageBox.Show("Enter valid coordinate values.");
return;
}
MapPoint inputMapPoint = new MapPoint(x, y, new SpatialReference(4326));
geometryService.ProjectAsync(new List<Graphic>() { new Graphic() { Geometry = inputMapPoint } }, MyMap.SpatialReference, inputMapPoint);
}