After installing the WF extensions for Visual Studio .NET 2005 my VS .NET hangs with 99% CPU usage on the splash screen. I have Visual Studio Team System Suite installed with Team Explorer, Web Application Project, VSTO, Guidance Automation, SQL Server 2005 and a couple of add-ins on top of it.

When I did some googeling about it I soon found other users (for example Sam Gentile) having the same problem (but with the pre-releases). I also found this feedback at Microsoft Connect, but I don't have that particular add-in. So I started to do some testing and soon found out that if I disabled all my add-ins from loading, VS.NET 2005 starts perfectly fine with WF extensions and the extensions is working. After doing a lot of install/uninstall of WS extensions I managed to figure out that the combination of loading WSCF Web Services Contract-First and/or CopySourceAsHtml add-in and WF extension causes VS.NET to hang. The VSCmdShell 1.1 add-in causes a Package Load Failure of the WS extension package. If I choose to not disable the package the restarted VS.NET starts without a problem and lets me work with the WF features.

I hope Microsoft reopens the feedback issue and investigates this problem further because I want my add-ins and WF extensions.