WCF passing xml content

Question

Hi

i am writing a restful webservice with contract like

[OperationContract] [WebInvoke(Method = "POST", UriTemplate = "PUser/Login?userid={userid}&password={password}",BodyStyle = WebMessageBodyStyle.Wrapped)] string Login(string userid, string password, string reqXml);

and implementation like...

public string Login(string userid, string password, string reqXml) { processing of userid,password,reqxml }

could somebody please tell me how do i pass the third parameter which would be an xml content in the post method by fiddler or how to pass the third parameter since the first two i can get in my query string. Thanks.