I don't know why the question mark. Here is Microsoft's own guidance on what is supported: http://msdn.microsoft.com/en-US/vstudio/hh487282.aspx http://msdn.mi

I don't know why the question mark. Here is Microsoft's own guidance on what is supported: http://msdn.microsoft.com/en-US/vstudio/hh487282.aspx http://msdn.microsoft.com/en-US/vstudio/hh487282.aspx When you go from having a Visual Studio release every two years to every year or year and a half, and each version brings an increment to the .NET runtime, the issue of not supporting older run times directly (without any hacks) in older versions becomes much more important. I understand and appreciate that to some extent it may be a technical issue and support needs to stop at a certain point but a lot of it seems to be business driven.