Like me you may have received this lately – it was all working before (and especially
on the developers machine 🙂 .
It turns out the VS2008 loves to update a registry key post installation, any sort
of new VS.NET version, e.g. VS.NET Test tools etc, will overwrite this key.
BTS specific information is wiped away..fortunately we set the registry key back
as follows:
http://blogs.msdn.com/biztalkcrt/archive/2009/08/21/visual-studio-2008-fails-to-create-open-biztalk-projects.aspx
(x86 and x64 scenarios)
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\VisualStudio\9.0\Projects\{FAE04EC0-301F-11d3-BF4B-00C04F79EFBC}]
“PossibleProjectExtensions”=”csproj” – Original VS install reg value.
“PossibleProjectExtensions”=”csproj;btproj” – Post Biztalk installation reg value