We have a great selection of links this week with topics including discriminated unions, equality and comparison constraints, purely functional data structures, a language performance comparison, and a couple of 1.9.7.8 compatibility tweaks for XNA and Silverlight. Also, the first Monday of the month approaches and with it another meeting of the ...

Over this past week at PDC I was lucky enough to see some fantastic sessions and spend time with members of the F# and greater Visual Studio language teams.  Naturally, these experiences have left me both floored and swimming in new ideas.  This edition of Discoveries This Week includes both the very best of what I saw at PDC 2009 and ...