I donโt think you can go this way, but you can load VS2010 projects into VS2008. Back up the 2008 solution, let VS2010 perform the conversion, and then download the 2008 solution again. There will be warnings that he is using an unknown version of the tool, but while your projects are "simple" (do not use any things specific to 2010), they should work.
I use this method for Noda Time , with the solutions "Noda Time VS2008.sln" and "Noda Time VS2010.sln". Using the same project files for both solutions is a real boon - this means that you must remember to add the source files to the โotherโ project when you add them to one.
Jon skeet
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