public static string AllManagerEmailString() { EvolutionEntities _db = new EvolutionEntities(); RolesManagementMethod _RolesManagementMethod = new RolesManagementMethod(); var Users = _RolesManagementMethod.GetManagersList(); string[] username = Users.Select(x => x.UserName).ToArray(); string AllManagerEmailAddress = String.Join(",", username); return(AllManagerEmailAddress); }