I have app where I'm using background worker to start some sequence. It needs to update GUI sometimes.

I have static class with references to some gui objects. In my logic I want to call method from this static class, with some parameters, there analyse it and update GUI. But I have "The calling thread cannot access this object because a different thread owns it." exception.

setting variable in first thread:

    public static void SetCardHand(ref CardHand ch)
    {
        cardHand = ch;
    }

Method called from background worker thread:

private static void SetCoveredCardsPlayer0(int cardsNumber)
    {

        if (cardsNumber < 1)
            cardHand.imgCard1.Source = null;
        else
            cardHand.imgCard1.Source = (ImageSource)WindowManager.Instance.CardsGUI.CardsDictionary["T1"];
    }

How to let this method change GUI?

edit

It's not a window class. Its something like presenter.

edit2

Its a card game. I'm starting it in background worker and I need to update Image source(representing card) after each Deal.