private void Window_Loaded(object sender, RoutedEventArgs e) { (mcChart.Series[0] as PieSeries).ItemsSource = new KeyValuePair <string, int>[] { new KeyValuePair <string, int>("Up-to-date Clients", 66), new KeyValuePair <string, int>("Out-dated Clients", 34), new KeyValuePair <string, int>("Expired subscriptions", 16) }; NoOfCoursesDictionApp.Text = contentManager.GetNoOfCourses().ToString(); }