Visual Studio 2008 failed to open/create a BizTalk Server 2009 project
You might encounter an issue in which Visual Studio 2008 fails to open/create a BizTalk Server 2009 project. This is caused when Visual Studio 2008 is repaired or when a Visual Studio 2008 update is installed; the registry entry is inadvertently changed from csproj;btproj to csproj. You can resolve this as follows:
For more information, see Visual Studio 2008 fails to create new BizTalk projects from the BizTalk Customer Response Team blog.
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