I have the following test method:

Imports System.Web



Imports System.Web.Services



Imports System.Web.Services.Protocols





<WebService(Namespace:=http://tempuri.org/)> _



<WebServiceBinding(ConformsTo:=WsiProfiles.BasicProfile1_1)> _



<System.Web.Script.Services.ScriptService()> _



Public Class DemoService

 Inherits System.Web.Services.WebService



<WebMethod()> _

Public Function GetCustomer() As String

    Return Microsoft

End Function





End Class

Even with the ResponseFormat attribute added the response is still being returned as XML rather than JSON.

Thoughts appreciated.