public static void MsgSetC2CReceiveMessageOpt() { string user_id = "287646"; List <string> user_id_list = new List <string>(); user_id_list.Add(user_id); TIMResult res = TencentIMSDK.MsgSetC2CReceiveMessageOpt(user_id_list, TIMReceiveMessageOpt.kTIMRecvMsgOpt_Receive, addAsyncDataToConsole); Utils.Log(((int)res).ToString()); addDataToConsole(res); }