public void LoadUserPerferenceAsync(string userCode, string preCode, object userState) { if ((this.LoadUserPerferenceOperationCompleted == null)) { this.LoadUserPerferenceOperationCompleted = new System.Threading.SendOrPostCallback(this.OnLoadUserPerferenceOperationCompleted); } this.InvokeAsync("LoadUserPerference", new object[] { userCode, preCode}, this.LoadUserPerferenceOperationCompleted, userState); }