As you may know, the BTS VS.NET IDE plugin during a build goes off and compiles your BizTalk maps, schemas and orchestrations to C#.

Then from there we have another compile and viola - we have dlls produced.

The IDE uses the compiler XSharpP.exe to produce your C# files.

Wouldnt it be nice to see what the C# files are - also very useful for line by line debugging.

All you need to do is to create the appropriate Registry Key and corresponding value
Key Location: HKCU\Software\Microsoft\VisualStudio\8
Key Name: BizTalkProject
Value Type: DWORD
Value Name: GenerateCSFiles (this is the only acceptible value at this point)
Value : 1
Done! Load a BTS Project up, and compile - you'll see some changes.

Note: I have had this fail a couple of times on some huge BTS solutions with over 40 odd 'Solution Folders' (and bts projects under those etc).