Returning JSON from WCF Web Service

I am trying to return JSON from a WCF Web service but all I get is bad request when I visit the URL.

Here is the interface:

 [ServiceContract]
    public interface I开发者_如何学运维HighWCFService
    {
        [OperationContract]
        [WebGet(BodyStyle = WebMessageBodyStyle.Bare,
        RequestFormat = WebMessageFormat.Json,
        ResponseFormat = WebMessageFormat.Json,
        UriTemplate = "KnownZombies")]
        [WebInvoke(Method = "GET")]
        List<ZombieInfo> GetZombies(); 

        [OperationContract]
        void DoWork();
    }

Here is the implementation of the above interface:

public class HighWCFService : IHighWCFService
    {
        public void DoWork()
        {
            throw new NotImplementedException();
        }

        public List<ZombieInfo> GetZombies()
        {
            var zombies = new List<ZombieInfo>()
                              {
                                  new ZombieInfo() {FirstName = "John", LastName = "Doe"},
                                  new ZombieInfo() {FirstName = "Mohammad", LastName = "Azam"}
                              };
            return zombies; 
        }
    }

    [DataContract]
    public class ZombieInfo
    {
        [DataMember]
        public string FirstName { get; set; }

        [DataMember]
        public string LastName { get; set; }
    }

I visit the following URL which results in 400 bad request:

http://localhost:22059/HighWCFService.svc/KnownZombies

The Web.Config looks like this:

<system.serviceModel>
  <behaviors>
   <serviceBehaviors>
    <behavior name="HighOnCodingWebApps.HighWCFServiceBehavior">
     <serviceMetadata httpGetEnabled="true" />
     <serviceDebug includeExceptionDetailInFaults="false" />
    </behavior>
   </serviceBehaviors>
  </behaviors>
  <services>
   <service behaviorConfiguration="HighOnCodingWebApps.HighWCFServiceBehavior"
    name="HighOnCodingWebApps.HighWCFService">
    <endpoint address="http://localhost:22059/HighWCFService.svc" binding="webHttpBinding" contract="HighOnCodingWebApps.IHighWCFService">
     <identity>
      <dns value="localhost" />
     </identity>
    </endpoint>
    <endpoint address="http://localhost:22059/HighWCFService.svc" binding="webHttpBinding" contract="IMetadataExchange" />
   </service>
  </services>
 </system.serviceModel>

---

Two things:

• I think a 400 bad request error is genearated by some other problem not related to JSON.
• I also think that you have to serialize that list in a list of JSON objects in order to receive them since you're not using SOAP anymore. You can use this class DATACONTRACTJSONSERIALIZER