I'm attempting at making a points system, so when a player kills another player they get given a set amount of points. How would i start?

I want to make a points tracker this is my code:

 private int eloPointsPerKill = 0;
            private void OnPlayerDeath(BasePlayer victim, HitInfo info)
            {
                BasePlayer killer = info?.Initiator?.ToPlayer();
                if (killer == victim)
                {
                    return;
                }
                else {
                    eloPointsPerKill += 50;
                    Puts("You have earnt <color=red>50</color> ELO points from that kill!");
                }

                return;
            }
            [Command("elo")]
            private void EloCommand(IPlayer player, string Command, string[] args)
            {
                player.Reply($"You've got <color=red>{eloPointsPerKill.ToString()}</color> ELO!");
            }

Whats wrong about it is that the ELO is shared to all players in the server, how could i go around this?

There are a number of ways to do this, but the simplest way would be to implement a Dictionary...

Dictionary<string, int> eloPointsPerKill = new Dictionary<string, int>();

           private void OnPlayerDeath(BasePlayer victim, HitInfo info)
           {
               BasePlayer killer = info?.Initiator?.ToPlayer();
               if (killer == victim)
               {
                   return;
               }
               else {
                   if(eloPointsPerKill.Contains(killer.UserIDString))
                   {
                        eloPointsPerKill[killer.UserIDString] += 50;
                   }
                   else
                   {
                        eloPointsPerKill.Add(killer.UserIDString, 50);
                   }
                   Puts("You have earnt <color=red>50</color> ELO points from that kill!");
               }

               return;
           }
           [Command("elo")]
           private void EloCommand(IPlayer player, string Command, string[] args)
           {
               eloPointsPerKill.TryGetValue(player.Id, out int points);
               player.Reply($"You've got <color=red>{points.ToString()}</color> ELO!");
           }​

Calytic

There are a number of ways to do this, but the simplest way would be to implement a Dictionary...

Dictionary<string, int> eloPointsPerKill = new Dictionary<string, int>();

           private void OnPlayerDeath(BasePlayer victim, HitInfo info)
           {
               BasePlayer killer = info?.Initiator?.ToPlayer();
               if (killer == victim)
               {
                   return;
               }
               else {
                   if(eloPointsPerKill.Contains(killer.UserIDString))
                   {
                        eloPointsPerKill[killer.UserIDString] += 50;
                   }
                   else
                   {
                        eloPointsPerKill.Add(killer.UserIDString, 50);
                   }
                   Puts("You have earnt <color=red>50</color> ELO points from that kill!");
               }

               return;
           }
           [Command("elo")]
           private void EloCommand(IPlayer player, string Command, string[] args)
           {
               eloPointsPerKill.TryGetValue(player.Id, out int points);
               player.Reply($"You've got <color=red>{points.ToString()}</color> ELO!");
           }​

I seem to be getting this error when using that code

(39,56): error CS1644: Feature `declaration expression' cannot be used because it is not part of the C# 6.0 language specification