Vista - playing with Windows Presentation Foundation

Hi,

I just started playing with Windows Presentation Foundation stuff... fun
stuff... and I just happened across what appears to be a cache of every
executable that I build or something... and I am a bit troubled by this...
but I tried to find some information on this and wasn't able to... didn't
really know what to look for... I guess it just bothers me because it seems
like unnecessary clutter. I use source control, so if I need a previous
build, I can get there... and I thought that my builds were confined to the
bin\debug or bin\release folders to which I built them... anybody know what
this is and if it can be disabled or "maybe" why I wouldn't want it
disabled??

the cache I found, btw, was in:

C:\Documents and Settings\Chris\Local Settings\Application
Data\assembly\dl3\QKRXB5CL.RDT\5A5CY98W.Q60

Thanks,
Chris