BizTalk WCF Service Publishing Wizard uses GAC'ed dll

Today I discovered a bug in the BizTalk WCF Service Publishing Wizard of BizTalk 2009 (yeah, I know... old stuff ;-).

At some point in the wizard you get to select the orchestrations dll which you want to use for generating the WCF service. I had made some changes to the orchestrations project, which I had compiled. But much to my surprise, the service didn't reflect my changes!

Only after I GAC'ed the dll the wizard worked and generated the service as I expected.

Conclusion: even though the wizard lets you pick the dll, it still uses the version from the GAC.