How can I create WPF controls in a background thread?

Question

I have method which create background thread to make some action. In this background thread I create object. But this object while creating in runtime give me an exception :

Answer 1

I solved my problem. I just used e.Result property of RunWorkerCompleted method. I get data in background thread and then use this data when thread completed. Thank every body for useful methods. Special thank to Veer to give a recommendation about e.Result property.