Error 409 WebServiceBindingAttribute is required on proxy classes. after creating a new build

After creating new build type 32bitDebug (based on Debug) according to How to: Create and Edit Configurations 
 
I received the following error during compile
Error     409     WebServiceBindingAttribute is required on proxy classes.     C:TFSmyProjectSGEN     MyAssemblyName

In the properties for the project. In the Build Tab. Select “Generate Serialization assembly:” to Off

 fixed the problem.
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