public GenerateRenderer()
{
InitializeComponent();
generateRendererTask = new GenerateRendererTask();
generateRendererTask.Url = "http://sampleserver6.arcgisonline.com/arcgis/rest/services/Census/MapServer/2";
generateRendererTask.ExecuteCompleted += generateRendererTask_ExecuteCompleted;
generateRendererTask.Failed += generateRendererTask_Failed;
}