The Code modifies the WebService address. synchronous and asynchronous modes are supported.

The Asynchronous Method is to customize a class that inherits the WebService class you reference and assign a value to an attribute.

public class MasterService : MasterDataServiceSoapClient    {        public MasterService()            : base()        {            try            {                string uri = string.Format("http://{0}:{1}/{2}", "localhost", "1111", "MasterDataService.asmx");                base.Endpoint.Address = new System.ServiceModel.EndpointAddress(new Uri(uri) { });            }            catch (Exception ex)            {                throw ex;            }        }    }    

The synchronization method also inherits the WebService class you reference and assigns a new attribute.
class ServiceProxy : ScanDemo.WS.Service    {        public ServiceProxy()        {            ServiceProtocol sp = new ServiceProtocol();            sp.LoadConfigs();            Url = string.Format("http://{0}:{1}/ScanDemo.WS/Service.asmx", sp.Server, sp.Port);        }    }