void Layers_LayersInitialized(object sender, EventArgs args)
{
if (parcelGraphicsLayer != null && parcelGraphicsLayer.Graphics.Count == 0)
{
QueryTask queryTask =
new QueryTask("http://sampleserver1.arcgisonline.com/ArcGIS/rest/services/TaxParcel/AssessorsParcelCharacteristics/MapServer/1");
Query query = new Query();
query.Geometry = new Envelope(-83.3188395774275, 42.61428312652851, -83.31295664068958, 42.61670913269855) { SpatialReference = new SpatialReference(4326) };
query.ReturnGeometry = true;
query.OutSpatialReference = MyMap.SpatialReference;
queryTask.ExecuteCompleted += queryTask_ExecuteCompleted;
queryTask.Failed += queryTask_Failed;
queryTask.ExecuteAsync(query);
}
}