input: [Category] Operations [Description] When using the WSHttpDualBidning for callbacks, WCF will use by default port 80 for the callbacks. This will likely conflict during development time with local installation of IIS, and is of little use in Intranet deployment. Instead of using a config file to hard-code the callback port or making programmatic calls at run time, you can use the IDesign's ClientBaseAddressBehaviorAttribute to configure the port, either hard-code it or select an available port at run time. The attribute implements the IContractBehavior interface, as shown in the download. [Last Updated] 9/7/2006 [Title] 
output: Dual HTTP Callback Address using an attribute