i searched the RTM version of this great new namespace, but it's gone!?

there was actually a MSDN-Mag article and i'm sure it was announced for
version 3.5...

in fact i planned to replace my own large integer arithmetic implementation
with the .net 3.5 one,
which should be much more sophisticated - i expected amazing performance
tests.

so, where did they hide it? can anybody open my eyes?

thanks!

/axel