Ошибка при использовании WCF serrvice : ошибка : удаленный сервер вернул ошибку: (415) не удается обработать сообщение, поскольку тип содержимого "application/json" не был ожидаемым типом..

  public class Service1 : IService1
    {
        public string GetData(int value)
        {
            return string.Format("You entered: {0}", value);
        }

        public CompositeType GetDataUsingDataContract(CompositeType composite)
        {
            if (composite == null)
            {
                throw new ArgumentNullException("composite");
            }
            if (composite.BoolValue)
            {
                composite.StringValue += "Suffix";
            }
            return composite;
        }
    }


   [ServiceContract]
    public interface IService1
    {

        [OperationContract]
        [WebInvoke(Method = "POST",
       BodyStyle = WebMessageBodyStyle.Bare, ResponseFormat = WebMessageFormat.Json, RequestFormat = WebMessageFormat.Json, UriTemplate = "GetData")]
        string GetData(int value);

        [OperationContract]
        CompositeType GetDataUsingDataContract(CompositeType composite);

        // TODO: Add your service operations here
    }


Web.config -

<pre><pre lang="c#"><?xml version="1.0"?>
<configuration>

  <appSettings>
    <add key="aspnet:UseTaskFriendlySynchronizationContext" value="true" />
  </appSettings>
  <system.web>
    <compilation debug="true" targetFramework="4.5.2" />
    <httpRuntime targetFramework="4.5.2"/>
  </system.web>
  <system.serviceModel>
    <behaviors>
      <serviceBehaviors>
        <behavior>
          <!-- To avoid disclosing metadata information, set the values below to false before deployment -->
          <serviceMetadata httpGetEnabled="true" httpsGetEnabled="true"/>
          <!-- To receive exception details in faults for debugging purposes, set the value below to true.  Set to false before deployment to avoid disclosing exception information -->
          <serviceDebug includeExceptionDetailInFaults="false"/>
        </behavior>
      </serviceBehaviors>
    </behaviors>
    <protocolMapping>
        <add binding="basicHttpsBinding" scheme="https" />
    </protocolMapping>    
    <serviceHostingEnvironment aspNetCompatibilityEnabled="true" multipleSiteBindingsEnabled="true" />
  </system.serviceModel>
  <system.webServer>
    <modules runAllManagedModulesForAllRequests="true"/>
    <!--
        To browse web app root directory during debugging, set the value below to true.
        Set to false before deployment to avoid disclosing web app folder information.
      -->
    <directoryBrowse enabled="true"/>
  </system.webServer>

</configuration>

int CloseCall1 = 28;

                DataContractJsonSerializer ser1 = new DataContractJsonSerializer(typeof(int));
                MemoryStream mem1 = new MemoryStream();
                ser1.WriteObject(mem1, CloseCall1);
                string data1 = System.Text.Encoding.UTF8.GetString(mem1.ToArray(), 0, (int)mem1.Length);

                WebClient webClient1 = new WebClient();
                //webClient1.Headers["Content-type"] = "text/xml";
                webClient1.Headers["Content-type"] = "application/json";
                webClient1.Encoding = System.Text.Encoding.UTF8;

                string strResponse = webClient1.UploadString("http://125.63.72.168:4444/Service1.svc/GetData", "POST", data1);

The remote server returned an error: (415) Cannot process the message because the content type 'application/json' was not the expected type 'text/xml; charset=utf-8'..