Sean/Sean/Services/AwardsPersistencyService.cs

using Discord;
using System;
using System.Collections.Generic;
using System.Linq;

namespace Sean.Services
{
    public class AwardsPersistencyService
    {
        #region Fields
        private Dictionary<string, int> scores = new Dictionary<string, int>();
        #endregion Fields

        #region Methods
        public int AddPoint(IUser user)
        {
            if (!scores.ContainsKey($"{user.Username}#{user.Discriminator}"))
                scores.Add($"{user.Username}#{user.Discriminator}", 1);
            else
                scores[$"{user.Username}#{user.Discriminator}"]++;
            return scores[$"{user.Username}#{user.Discriminator}"];
        }

        public string LeaderBoard()
        {
            string board = string.Empty;
            foreach (KeyValuePair<string, int> score in scores.OrderByDescending(s => s.Value))
            {
                board += $@"{score.Key} => {score.Value}" + Environment.NewLine;
            }
            return board;
        }

        public int RemovePoint(IUser user)
        {
            if (!scores.ContainsKey($"{user.Username}#{user.Discriminator}"))
                scores.Add($"{user.Username}#{user.Discriminator}", -1);
            else
                scores[$"{user.Username}#{user.Discriminator}"]--;
            return scores[$"{user.Username}#{user.Discriminator}"];
        }
        #endregion Methods
    }
}