Many cool things often go undocumented. I’ve just stumbled upon one of those, and it comes in handy to close this year of blogging.
Imagine this situation: you have a server-side .NET object, that you want to pass on to the client. With the .NET System.Windows.Forms-based objects, you have to make the object serializable, deploy the object to the client-side Add-in folder, and then set the RunOnClient property on the C/AL variable to Yes.