Microsoft Windows Phone Development MVP
I was surprised when I first wrote a hello world application on the MIX CTP that the Environment.OSVersion.Version property was returned as 7.0 when all the media speculation was that it would be based on CE 6. I tweeted about it at the time but some sources are still saying that it runs a customised version of Windows Embedded CE 6.0 R3. However regardless of whether this is a version which pre-dates the eventual release of Windows Embedded Compact 7 (which will be the new name for the successor to Windows Embedded CE 6.0) and any other name changes (remember we have already had Windows CE, Windows CE.NET and Windows Embedded CE) I think it’s safe to say that the core OS in the product is version 7. As we already know Silverlight (and XNA) runs on top of the .NET Compact Framework 3.7 runtime. So just for curiosities sake here are the version properties retrieved in the latest April CTP release:-

About PeterFoot
Peter Foot is co-author of the Microsoft Mobile Development Handbook published by Microsoft Press. Peter has been awarded the Microsoft Most Valuable Professional (MVP) accolade since 2003 for his involvement in the Microsoft .NET Compact Framework developer community. Alongside an active presence in several online forums and communities, attendance at developer conferences and involvement in shared-source projects, Peter has also written a number of technical articles and maintains an active technical blog.