BAL.Manager.UserManager.SetClientBonus C# (CSharp) Method

        public void SetClientBonus(int userId, double bonus, double paidByBonus)
        {
            var user = uOW.UserRepo.All.Where(u => u.Id == userId).FirstOrDefault();
            if (user != null)
            {
                user.Bonus -= paidByBonus;
                user.Bonus += bonus;
                uOW.Save();
            }
        }