Well just got around to checking my mail and getting down and dirty updating VS.NET Whidbey beta 1 over to the latest December CTP release, ho-hum being a CTP release i decided i'd do two installations, one on a clean non-dev machine with XPSP2(PC1) and the on an already Whidbey beta 1 installed machine(PC2).
PC1 installed fine (3.1GB+1.5GB approx for documentation i think) after which i installed the latest Yukon beta (not express builds), however PC2 gave me “Error 1304.Error writing to file: Microsoft.VisualStudio.Windows.Forms.dll. Verify that you have access to that directory.”
At first i thought the file must be locked so i cancelled setup, restarted and re-ran setup on a clean boot. Nope. Then i realised that the installer (as yet) doesnt migrate VS.NET Whidbey Beta 1 -> beta 2 (maybe the final beta 2 will) so if you do experience this issue you have to:
1) Uninstall VS.NET Whidbey Beta 1 (or any pre-release builds released there after)
2) Uninstall .NET 2.0 Beta 1
3) Restart to make sure all is removed
4) Re-Run setup
You'll have to restart again during setup after .NET 2.0 Beta 2 (Pre) is installed but you'll find the problems with M.VS.W.F.dll are gone. Alternatively you can just uninstall Whidbey only and see if that helps...
So what if you dont have VS.NET Whidbey beta 1 installed? You could press on and find some .NET Framework errors popping up, primarily if you installed Yukon Beta 1 (again not express) or pre-release builds that included the earlier .NET 2.0 release you'll need to either upgrade to hte latest yukon beta (very funky beta 2) or update the .NET framework install.
Lastly can i add, that Whidbey and .NET 2.0 ROCKS!