I\'ve create a regular old ASMX web service in ASP.NET and added SoapDocumentMethod(OneWay = true)] to the function call as I\'ve read this is supposed to make the call Asyn
You still have to make the call using the Async method. You should make the call to service.UpdateAccountsAsync()
in this case.
Are you returning a value? The documentation for OneWay states that "fire and forget" web methods cannot return a value or have out parameters.
http://msdn.microsoft.com/en-us/library/system.web.services.protocols.soapdocumentmethodattribute.oneway(VS.80).aspx