I've noticed that people often confuse the various issues (not having a go a Bill though :-} )
At least Entity Framework leap-frogged a couple of versions so that it is now also EF 4.0 ......

>That's a better answer than I gave. The original question is very ambiguous as there is no such thing as C# VS 2008 or C# VS2010. C#, VS, and the .NET framework are all different products that can (and have had) different version numbers and be released on different schedules.
>
>Current versions:
>Visual Studio 10 (marketed as Visual Sudio 2010)
>C# 4.0 (marketed as Visual C# 2010)
>VB 10 (marketed as Visual Basic 2010) *** NOTE: It is not marketed/nor versioned as VB.NET
>.NET Framework 4.0.30319 (marketed as .NET Framework 4) *** NOTE It is not marketed as 4.0
>
>
>>>I'm converting some apps from C# VS2008 to C# VS2010
>>>Does anything have to be done with the workstations?
>>
>>Depends on what verion of .Net you are targeting (set in Properties/Application) for the project.
>>If you're targeting .NET 4 then you will need the relevant .NET libraries installed.
>>If you're targeting the same version as currently installed then no problems......