How to avoid InvalidOperationException in C#?

Question

C++ / C#

Good afternoon! Faced such a problem. In the main thread, I open a child thread in which I work with the form object (progressBar). An exception is thrown:
Additional information: Illegal multi-thread operation: An attempt was made to access control 'pB1' from a thread other than the thread it was created on. How can this be avoided? Transferring flow work from a form is not an option. Thanks in advance!

Answer 1

Work with form elements is possible only from the thread in which they are created.
If you want to update the progressBar, pass the value from your helper thread to the main thread and it will update the progressBar already

Answer 2

Dispatcher should solve the problem

Answer 3

Through the mechanism of events probably too can turn out.