How will developers be able to check what versions of the .NET Framework are installed?
The .NET Framework Client Profile Preview will do the proper version checking for the developer. However, if the developer needs to do a check on the .NET Framework version installed, the Client Profile Preview has a registry key and User Agent String that can be checked. For more information, please see the .NET Framework Client Profile Preview Deployment Guide. As mentioned earlier, the .NET Framework Client Profile Preview contains files that are found in .NET Framework 2.0, 3.0, and 3.5. When the Client Profile Preview is installed it will not attempt to fake out the system to make it seem as the other versions of the framework are installed. The Client Profile Preview will only register itself as being installed.