Accessing GH_Document from the background thread (C#)

Hi,

I am working on a UI (c# forms) which is able to control sliders and to start a new solution. I got it working on the main/ui thread. Now I would like to shift the work to a background thread to achieve that the UI is still responsible during a new solution. 

Therefor I find the c# backgroundWorker approach pretty smart. Unfortunately, I always get an error because my access on the GH_DocumentEditor seems to be from a different thread. 

Can anyone give me a hint what is mandatory to change slider values and start new solutions (like Doc.NewSolution(true)) out of the background thread?

Thanks in advance.

Cheers,

Daniel