void _geoprocessorTask_GetServiceInfoCompleted(object sender, GPServiceInfoEventArgs e)
        {
            LayersList.ItemsSource = e.GPServiceInfo.Parameters.FirstOrDefault(p => p.Name == "Layers_to_Clip").ChoiceList as object[];

            Formats.ItemsSource = e.GPServiceInfo.Parameters.FirstOrDefault(p => p.Name == "Feature_Format").ChoiceList as object[];
            if (Formats.ItemsSource != null && Formats.Items.Count > 0)
            {
                Formats.SelectedIndex = 0;
            }
        }
        void _geoprocessorTask_GetServiceInfoCompleted(object sender, GPServiceInfoEventArgs e)
        {
            LayersList.ItemsSource = e.GPServiceInfo.Parameters.FirstOrDefault(p => p.Name == "Layers_to_Clip").ChoiceList as object[];

            Formats.ItemsSource = e.GPServiceInfo.Parameters.FirstOrDefault(p => p.Name == "Feature_Format").ChoiceList as object[];
            if (Formats.ItemsSource != null && Formats.Items.Count > 0)
                Formats.SelectedIndex = 0;
        }