VS 2010's multi-targeting support enables you to work on
projects that target .NET 4.0, .NET 3.5, .NET 3.0 and .NET 2.0. It will
allow you to start taking advantage of the new tooling features, without having
to immediately upgrade the clients and servers running your application’s to
.NET 4.0. The improved multi-targeting support will ensure that this
experience is even better and more accurate than before.
Hope this helps,
Scott
P.S. In addition to blogging, I have been using Twitter more
recently to-do quick posts and share links. You can follow me on Twitter
at: http://www.twitter.com/scottgu
(@scottgu is my twitter name)