using ThreadStatic variables with async/await

Question

With the new async/await keywords in C#, there are now impacts to the way (and when) you use ThreadStatic data, because the callback delegate is executed on a different thre

Answer 1

AsyncLocal provides support for maintaining variables scoped to a particular asynchronous code flow.

Changing the variable type to AsyncLocal, e.g.,

private static AsyncLocal Secret = new AsyncLocal();

gives the following, desired output:

Started on thread [5]
Secret is [moo moo]
Was on thread [5]
Now on thread [6]
Finished on thread [6]
Secret is [moo moo]