public static void SendPM(string message, string username, string token)
 {
     try
     {
         SlackClient client = new SlackClient(token);
         client.PostMessage(message, "R3mus Bot", string.Concat("@", username));
     }
     catch (Exception ex)
     {
     }
 }
        public static void SendToRoom(string message, string roomname, string token, string username = "******")
        {
            try
            {
                SlackClient client = new SlackClient(token);
                client.PostMessage(message, username, string.Concat("#", roomname));

            }
            catch (Exception ex)
            {
                throw ex;
            }
        }
        public static void SendToRoom(MessagePayload payload, string roomname, string token, string username = "******")
        {
            try
            {
                payload.Channel = string.Concat("#", roomname);
                payload.Username = username;

                SlackClient client = new SlackClient(token);
                client.PostMessage(payload);
            }
            catch (Exception ex)
            {
            }
        }