Question: I created WCF service and testing WCF client using stand alone application. I was able to view this service using Internet Explorer also able to view in Visual studio service references. Here is the error message.

`"The content type text/html; charset=UTF-8 of the response message does not match the content type of the binding (text/xml; charset=utf-8)."`

Could you please advice what could be wrong?

Thank you.

Answer: 
This may be helpful, check the url rewrite rules in ISS 7. This issue will occur if is you didn't configure rule properly.
i was getting this error in NavitaireProvider while calling BookingCommit service (WCF Service Reference)

so, when we get cached proxy object then it will also retrived old SigninToken which still may not be persisted
so that not able to authenticate

so as a solution i called **Logon** Service when i get this exception to retrieve new Token