Cross Thread Exception

Question

I got Cross thread exception, in my project i am using backgroundworker thread, whenever it calls , i am trying to use web browser to open a web page in the form of windows.
when web browser instance create , it gives "cross-thread operation not valid: control 'oauth browser' accessed from a thread other than the thread it was created on."

Is that calling a second thread in a first running thread is invalid?
 

can you please suggest a solution to remove exception