access web service method with parameter using desktop app

Question

I want my function in web service should return xml data and it should take a parameter also.

 

[OperationContract]

[WebInvoke(Method = "GET",

RequestFormat=WebMessageFormat.Xml,

ResponseFormat = WebMessageFormat.Xml,

BodyStyle = WebMessageBodyStyle.Wrapped,

UriTemplate = "xmlData{id}")]

 

string xmlData(string id);

 

in class I just returned the value:

 

string xmlData(string id){

return "id is:"+id;

} 

 

Its working in my web browser but i want it to be called by a simple desktop application but that application is giving me an exception that not endpoint found

 

Help me so that I can get an answer