ArcGISWindowsPhoneSDK.AttributeQuery.QueryListBox_SelectionChanged C# (CSharp) Method

        private void QueryListBox_SelectionChanged(object sender, SelectionChangedEventArgs e)
        {
            QueryButton.Content = QueryListBox.SelectedItem.ToString();

            if (QueryListBox.SelectedItem.ToString().Contains("Select..."))
                return;

            QueryTask queryTask = new QueryTask("http://sampleserver1.arcgisonline.com/ArcGIS/rest/services/Demographics/ESRI_Census_USA/MapServer/5");
            queryTask.ExecuteCompleted += QueryTask_ExecuteCompleted;
            queryTask.Failed += QueryTask_Failed;

            ESRI.ArcGIS.Client.Tasks.Query query = new ESRI.ArcGIS.Client.Tasks.Query();
            query.OutSpatialReference = MyMap.SpatialReference;
            query.Text = QueryListBox.SelectedItem.ToString();
            query.ReturnGeometry = true;
            query.OutFields.Add("*");

            queryTask.ExecuteAsync(query);

            QueryChoicesPage.IsOpen = false;
        }