Question

I’m trying to find a practical use for System.Threading.CompressedStack. Something cool, not “Oh, we can move the stack from one thread to another for fun”, but rather when one would actually want to do that or whatever else you can do with this fun little class.

Answer 1

This is really designed for internal use by the framework. From the documentation:

The CompressedStack class is used internally by the SecurityContext class. For example, the SecurityContext.Capture method captures the compressed stack for the current call stack, along with impersonation and culture information. The SecurityContext class is used in turn by the ExecutionContext class to flow context across threads, for example when scheduling thread pool tasks.

This class is not used in ordinary application programming.