static public void notifyAll() { DataAbstract DA = new DataAbstract(); DataTable userIDs = DA.returnAllUserIDs().Tables[0]; for (int rows = 0; rows < userIDs.Rows.Count; ++rows) { int user = Convert.ToInt32(userIDs.Rows[rows].Field <object>("UserID")); notifyOne(user); }//end of userID }