I'm made an exact copy of the code from the Group Layers sample below and I can't get the ChildLayers to show up. I only end up seeing the "Bloomdfield Hills" parent layer. See attached Screenshot.
You might have defined a default legend style in your app that would overwrite the standard legend style. Look in your app if there is no style defined for the legend (for example in app.xaml)
You might have defined a default legend style in your app that would overwrite the standard legend style. Look in your app if there is no style defined for the legend (for example in app.xaml)