Creating objects inside async thread causes STA exception

Question

I have a class, which should show some messages to the user, when the status of some operation is changed, like this:

public static class AutoUpdater
    {
        public static async void AutoUpdateCheck()
        {
            UpdaterStatus.CurrentUpdateStatus = await UpdaterLogic.CheckForUpdateAsync();
        }

        public static void OnStatusChanged()
        {
                switch (UpdaterStatus.CurrentStatus)
                {
                    case UpdateStatus.UpdateFound:
                        {
                            Message ToAdd = new Message("some params"); //Exception here
                            MessagesManager.AddNewMessage(ToAdd);
                            break;
                        }
                    //some other cases
                }
        }

When app starts, i subscribe AutoUpdater to an event like this:

UpdaterStatus.EventStatusChanged += (sender, args) => { AutoUpdater.OnStatusChanged(); };

The exception I get is: "The calling thread must be STA, because many UI components require this".

However, I can't create the STA thread by myself, and then add newly created message to its parent control, because this way I get an exception, saying that "that object belongs to another thread".

Is there any workaround?

Answer 1

You should to create UI controls from UI thread. You can try to use dispatcher here

Application.Current.Dispatcher.Invoke(/* your action here*/ () => {/* creating UI controls */});