F# cross-thread UI exception in WinForms App

Question

I have a problem with developing a simple application in F#, which just reads the length of the requested HTML page.

Seems to be that such an error would be similar for

Answer 1

I had the same problem in that the Async.SwitchToContext did not switch to the Main Gui thread. It was in fact switching to some other thread.

In the end I found that the problem was how I got the uiContext in the first place. Using the following worked:

let uiContext = System.Threading.SynchronizationContext.Current

But it didnt work with:

let uiContext = System.Threading.SynchronizationContext()