This operation is not supported in the wcf test client because it uses type system.io.stream error while hosting WCF service even if method return stream

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WCF

1)I create one WCF Service Appliaction as WCFServiceForStream.

2)My IService1,cs contains,

using System;
using System.Collections.Generic;
using System.Linq;
using System.ServiceModel;
using System.Data;
using System.IO;

namespace WCFServiceForStream
{

[ServiceContract]
public interface IService1
{
[OperationContract]
Stream GetStream();
}
}

3)My Service1.svc as,

using System;
using System.Collections.Generic;
using System.Linq;
using System.IO;
using System.Data.SqlClient;
using System.Data;

namespace WCFServiceForStream
{
public class Service1 : IService1
{
public Stream GetStream()
{
//this file path assumes the image is in
// the Service folder and the service is executing
// in service/bin
string filePath = Path.Combine(System.Environment.CurrentDirectory,".\\..\\image.jpg");
//open the file, this could throw an exception
//(e.g. if the file is not found)
//having includeExceptionDetailInFaults="True" in config
// would cause this exception to be returned to the client
try
{
FileStream imageFile = File.OpenRead(filePath);
return imageFile;
}
catch (IOException ex)
{
Console.WriteLine(
String.Format("An exception was thrown while trying to open file {0}", filePath));
Console.WriteLine("Exception is: ");
Console.WriteLine(ex.ToString());
throw ex;
}
}

}
}

4)My web.config as,

<?xml version="1.0"?>
<configuration>

  <system.web>
    <compilation debug="true" targetFramework="4.0" />
  </system.web>
  <system.serviceModel>
    <bindings>
      <customBinding>
        <binding name="basicConfig">
          <binaryMessageEncoding/>
          <httpTransport transferMode="Streamed" maxReceivedMessageSize="67108864"/>
        </binding>
      </customBinding>
    </bindings>
    <behaviors>
      <serviceBehaviors>
        <behavior>
          <!-- To avoid disclosing metadata information, set the value below to false and remove the metadata endpoint above before deployment -->
          <serviceMetadata httpGetEnabled="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>
    <serviceHostingEnvironment multipleSiteBindingsEnabled="true" />
  </system.serviceModel>
 <system.webServer>
    <modules runAllManagedModulesForAllRequests="true"/>
  </system.webServer>

</configuration>

But when I run Service1.svc for Hosting,
It will give me error as,
this operation is not supported in the wcf test client because it uses type system.io.stream
even if method returns stream.