private bool SignInToServer(UserInfo user) { EndpointAddress ep = new EndpointAddress( "http://" + ServerIp + ":8089/wcf"); ChannelFactory <ISignInService> factory = new ChannelFactory <ISignInService>(new BasicHttpBinding(), ep); ISignInService proxy = factory.CreateChannel(); var t = proxy.ClientSignInAsync((JsonConvert.SerializeObject(user))); return(t.Result); }