The title is pretty much self-explanatory. What I want to know is will I be able to program in VS 2010 and the .NET 4.0 platform using C# 3.0

Thanks in advance!!

Your question is actually a little vague.

You can program in 2010 and use C# 3.0 syntax. More than likely, it will compile just fine; but, by default your executable will target the .NET 4.0 runtime, and any machine you deploy to will have to have that framework installed.

Also, you can use VS2010 to "target" a different runtime-- ie, use 2010, but say, target for .NET 2.0 or 3.5. Check this post out:

http://weblogs.asp.net/scottgu/archive/2009/08/27/multi-targeting-support-vs-2010-and-net-4-series.aspx

commented: helpful link +2