The Microsoft .NET Framework 4 provides the following new features and improvements:
Improvements in Common Language Runtime (CLR) and Base Class Library (BCL)
Performance improvement including better multicore support, background garbage collection, and proFILEr attach on server.
New memory mapped file and numeric types.
Easier debugging including dump debugging, Watson minidumps, mixed mode debugging for 64 bit and code contracts.you can free download Microsoft .NET Framework 4 now.
Last edited by Ni3 on Sun Aug 15, 2010 2:38 pm; edited 2 times in total (Reason for editing : Link not work properly)