public void UpdateUserList_Test1() { IrbisConnection connection = Connection.ThrowIfNull(); UserInfo[] oldUsers = connection.ListUsers(); UserInfo tylerDurden = new UserInfo { Name = "TylerDurden", Password = "******" + DateTime.Now.Ticks, Cataloger = "tyler.ini" }; List <UserInfo> newUsers = oldUsers .Where(user => user.Name != "TylerDurden") .ToList(); newUsers.Add(tylerDurden); connection.UpdateUserList(newUsers.ToArray()); Write ( string.Join ( ", ", oldUsers.Select(u => u.Name).ToArray() ) ); Write ( " | was: {0}, now: {1}", oldUsers.Length, newUsers.Count ); }