Content Type application/soap+xml; charset=utf-8 was not supported by service

I run into naming problem. Service name has to be exactly name of your implementation. If mismatched, it uses by default basicHttpBinding resulting in text/xml content type.

Name of your class is on two places – SVC markup and CS file.

Check endpoint contract too – again exact name of your interface, nothing more. I’ve added assembly name which just can’t be there.

<service name="MyNamespace.MyService">
    <endpoint address="" binding="wsHttpBinding" contract="MyNamespace.IMyService" />
    <endpoint address="mex" binding="mexHttpBinding" contract="IMetadataExchange"/>
  </service>