Failed to add a service. Service metadata may not be accessible. Make sure your service is running and exposing metadata.`

Question

EDIT:

After I modified the web.config and I don\'t get error that\'s good.... then I add a new page (html) and write this small code to consume the serv

Answer 1

I observed that when I removed SessionMode from the ServiceContract attribute, the issue went away.

Example:

[ServiceContract(SessionMode=SessionMode.Required, CallbackContract=typeof(ICallbacks))]
 public interface IStringReverser
 {
   [OperationContract]
   string ReverseString(string value);
 }

to...

[ServiceContract()]
 public interface IStringReverser
 {
   [OperationContract]
   string ReverseString(string value);
 }