How can I fix the AddressAlreadyInUse Exception in WCF ?

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C#

WCF

I have a WCF project which is self hosted. My service is defined under host project in a separate .cs file. I build the host, it built correctly and ran successfully. But when I included client to connect with the host. it also built successfully.. But when I start debugging the output shows the following message with "AddressAlreadyInUse" exception.

"HTTP could not register URL http://+:8733/HelloIndigoService/. Another application has already registered this URL with HTTP.SYS";

So I changed the port number but it also showed the same result. I checked the list of processes from the task manager. Only a vshost.exe file in running because of visual studio is holding my project in running mode. If I close the solution it vanishes from the task manager.

What should I do now?