ChildWindow window = new ChildWindow();
FeatureDataForm form = new FeatureDataForm()
{
GraphicSource = graphic,
FeatureLayer = featureLayer,
IsReadOnly = !featureLayer.IsUpdateAllowed(graphic),
MaxWidth = 500,
MaxHeight = 500
};
window.Content = form;
form.EditEnded += (s, e) =>
{
var graphic = form.GraphicSource;
window.Close();
};
window.ShowDialog();