Windows Forms. How to execute a function from a separate thread in the main thread?

Question

C++ / C#

Windows Forms. How to execute a function from a separate thread in the main thread? The function is called in an async method, but it doesn't fire.

Answer 1

More or less like this.
https://docs.microsoft.com/en-us/dotnet/api/system...
And how did you understand that it doesn't work?