Actually i am not using multi-threading in the ASP.net code.  The problem is
that huge amount of code has been written.  But due to a design flaw, now I
need to send some information to an external assembly.  The only way I can
think of is to use the Data slot.  So that i can set it on the code behind,
and up in the callstack the external assemly can retrieve that data.

I know it is not a good solution.  But this is the only way I can think of.

Only thing I am afraid is that if IIS (not my code) completes the web
request with more than one (sequentially run) threads. And the data that I
set to the thread at code behind, is not available in the external assembly
because IIS messed with it.