Can I use Visual Studio 2010 and not upgrade to .NET Framework 4.0?

I have many Visual Studio 2008 web projects targeted at the .NET Framework 3.5. I want to start using Visual Studio 2010, but the .NET Framework 4.0 isn't very well supported by web hosting companies just yet. It seems to make sense to stick with the .NET Framework 3.5 for开发者_JAVA百科 now. If I open my projects in Visual Studio 2010 and leave them targeted at the .NET Framework 3.5, am I going to have problems?

Visual Studio 2010 supports multitargeting which means that you can target .NET 3.5SP1 with it. See the page for more specific details.

Yes you can you can set your target in your project properties and you shouldn't run into any problems.

Yes, VS 2010 support developing in .net 2.0 3.5 and 4