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I have a webservice that gets deployed to the inetpub folder of my site. As long as my assembly deployment target is GlobalAssemblyCache everything is working fine and I can see the WSDL. But if I change the assembly deployment target to WebApplication, I can't see the WSDL anymore and I get a 400 Bad Request error. Is this just not possible or is it just a configuration error?

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Items in the GAC run with full trust whereas items in the web app /bin/ folder run with the trust level defined in the controlling web.config, which is usually minimal. What is probably happening is that your web service is attempting to access a resource beyond what is allowed which is why it fails in /bin/ but works in the GAC

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My webservice executes some stored procedures. Is this not allowed from the bin? I've also changed the trustlevel from minimal to medium. – Marlou Mar 21 '12 at 13:16
Even Medium might not allow access to whatever resources your web service may be using. Try placing the assembly in _app_bin instead. If that doesn't work, you will need to either create a Custom Access Policy or put the DLL in the GAC – Dave Wise Mar 21 '12 at 13:24

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