是否有可能以某种方式升级.NET版本而不升级Visual Studio版本？

I currently use Visual Studio 2005 for all my personal projects, which means I'm also working with the .NET 2.0 framework. As one could imagine, it's getting that outdated feeling to it. I got this version of VS for free through MSDN's academic alliance program when I was in school. Now that I'm out of school, I sadly don't have access to MSDNAA so software is no longer free. I currently use Visual Studio 2005 for all my p