HTTP Bad Request error when requesting a WCF service contract

Question

I have a WCF service with the following configuration:

Answer 1

I was able to fix the "400 Bad Request" problem by switching my WCF service from running off of Visual Studio Development Server to using Local IIS Web server (right click on the project --> properties --> web tab --> radio button under "Servers"). I hope this helps someone out there because it took me two days to figure this one out.