Prestige system in item

case 5000:
                    session.Character.PrestigeFunction(inv);
                    break;

        public void PrestigeFunction(ItemInstance inv)
        {
            if (Session.Character.MapInstance != null)
            {
                if (Session.Character.Inventory.Any(s => s.Type == InventoryType.Wear))
                {
                    Session.SendPacket(UserInterfaceHelper.GenerateMsg(Language.Instance.GetMessageFromKey("EQ_NOT_EMPTY"), 0));
                    return;
                }

                if (Session.Character.Prestige < 30 && Session.Character.Level == 99 && Session.Character.HeroLevel == 50)
                {
                    Session.Character.Prestige++;
                    ServerManager.Shout(Name + " est passé prestige " + Prestige);
                    Session.Character.Level = 1;
                    Session.Character.HeroLevel = 0;
                    Session.Character.JobLevel = 1;
                    Session.Character.JobLevelXp = 0;
                    Session.Character.HeroXp = 0;
                    Session.Character.LevelXp = 0;
                    Session.SendPacket(Session.Character.GenerateLev());
                    Session.SendPacket(Session.Character.GenerateLevelUp());
                    Session.SendPacket(Session.Character.GenerateStat());
                    Session.Character.Inventory.RemoveItemFromInventory(inv.Id);
                    ServerManager.Instance.ChangeMap(Session.Character.CharacterId, 1, 80, 116);            
                    Session.SendPacket(Session.Character.GenerateSay(
                    Language.Instance.GetMessageFromKey("PRESTIGE_UP"), 0));
                }
                else
                {
                    Session.SendPacket("msg 4 Tu n'as pas le niveau requis !");
                }
            }
        }

#region buff prestige
            if (PrestigeBuff.AddSeconds(30) <= DateTime.Now)
            {

                    if (Session.Character.Prestige >= 1)
                    {
                        AddBuff(new Buff(242, Level), BattleEntity);
                       
                    }
                    else
                    {
                        RemoveBuff(242);
                    }

                    if (Session.Character.Prestige >= 5)
                    {
                        AddBuff(new Buff(118, Level), BattleEntity);
                     
                    }
                    else
                    {
                        RemoveBuff(118);
                    }

                    if (Session.Character.Prestige >= 10)
                    {
                        AddBuff(new Buff(332, Level), BattleEntity);
                        
                    }
                    else
                    {
                        RemoveBuff(332);
                    }

                    if (Session.Character.Prestige >= 15)
                    {
                        AddBuff(new Buff(246, Level), BattleEntity);
                        
                    }
                    else
                    {
                        RemoveBuff(246);
                    }

                    if (Session.Character.Prestige >= 25)
                    {
                        AddBuff(new Buff(245, Level), BattleEntity);
                    }
                    else
                    {
                        RemoveBuff(245);
                    }

                    if (Session.Character.Prestige >= 29)
                    {

                        AddBuff(new Buff(411, Level), BattleEntity);
                       
                    }
                    else
                    {
                       RemoveBuff(411);
                    }
                    PrestigeBuff = DateTime.Now;
                
               
            }
            #endregion

Prestige : {PrestigeLevel}