Question

I have a “List” in the main application and I am trying to access its elements from within a thread. I am getting this exception:
{“The calling thread cannot access this object because a different thread owns it.”} System.SystemException {System.InvalidOperationException}

Answer 1

DispatcherOperation d = myListBox.Dispatcher.Invoke(DispatcherPriority.Normal, new Action(() => 
{ 
    // access your listbox and return something
})); 

Then demand your DispatcherOperation for the return value

myValue = d.Result; //Result is of type Object