“You are making my point!”

If you are running Visual Studio 2008 developing BizTalk 2009 projects, and all of a sudden you find that your Visual Studio fails to create new BizTalk projects, don’t panic. This is a known issue. Apparently one of the recent Visual Studio patches (mostly likely automatically downloaded and applied to your machine) has a bug. It accidentally removes “.btproj” from the project extension setting in a Visual Studio registry key.

You can either fix this key manually (quick but you need to know what you are doing), or simply run the installation of BizTalk SDK in repair mode (less risky but takes a while). You can find the details here in BizTalk Customer Response Team’s blog.