What's wrong with calling Invoke, regardless of InvokeRequired?

Question

I\'ve seen the common setup for cross threading access to a GUI control, such as discussed here: Shortest way to write a thread-safe access method to a windows forms control

Answer 1

InvokeRequired basically tells you if you're executing on the right thread or not. If you're not on the correct thread, you need to marshal the task to the correct thread otherwise you don't. Hence the need for the check.