When I create a layer, set an entry on its user dictionary and change a property (in this case IsVisible) everything is fine. However, if I add the layer, the get it from the layer collection and then change IsVisible, the user dictionary gets cleared.
@dale can you confirm this? I am still on SR10, so it may have been fixed in the mean time.
public Result RunCommand(RhinoDoc doc, RunMode mode)
{
Layer l = new Layer();
l.Name = "With User Dictionary Entry";
//int idx = doc.Layers.Add(l);
//Layer retrieved = doc.Layers[idx];
l.UserDictionary.SetEnumValue(mode);
RhinoApp.WriteLine($"User dictionary has {l.UserDictionary.Count} entries");
l.IsVisible = false;
RhinoApp.WriteLine($"User dictionary has {l.UserDictionary.Count} entries");
l.IsVisible = true;
int idx = doc.Layers.Add(l);
Layer retrieved = doc.Layers[idx];
RhinoApp.WriteLine($"Retrieved user dictionary has {retrieved.UserDictionary.Count} entries");
retrieved.IsVisible = false;
// now, in the layer that was obtained from the layers collection, settings IsVisible=false
// will clear out the user dictionary. This is unexpected behavior.
RhinoApp.WriteLine($"Retrieved user dictionary has {retrieved.UserDictionary.Count} entries");
retrieved.IsVisible = true;
RhinoApp.WriteLine($"Retrieved user dictionary has {retrieved.UserDictionary.Count} entries");
return Result.Success;
}