Add project files.

CMD_LevelingSystem/CMD_LevelingSystem.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net5.0</TargetFramework>
+  </PropertyGroup>
+
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|AnyCPU'">
+    <OutputPath>E:\DiscordBot\BUILDS\</OutputPath>
+    <DefineConstants>DEBUG;TRACE</DefineConstants>
+    <ErrorReport>prompt</ErrorReport>
+    <DebugType>none</DebugType>
+    <DebugSymbols>false</DebugSymbols>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\PluginManager\PluginManager.csproj" />
+  </ItemGroup>
+
+</Project>

CMD_LevelingSystem/Commands/level.cs

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+using Discord;
+using Discord.Commands;
+using Discord.WebSocket;
+
+using PluginManager.Interfaces;
+using PluginManager.LanguageSystem;
+
+using System;
+
+
+public class level : DBCommand
+{
+    public string Command => "rank";
+
+    public string Description => "Display your current level";
+
+    public string Usage => "rank";
+
+    public bool canUseDM => false;
+
+    public bool canUseServer => true;
+
+    public async void Execute(SocketCommandContext context, SocketMessage message, DiscordSocketClient client, bool isDM)
+    {
+
+        try
+        {
+            int cLv = Data.GetLevel(message.Author.Id);
+            Int64 cEXP = Data.GetExp(message.Author.Id);
+            Int64 rEXP = Data.GetReqEXP(message.Author.Id);
+
+            var embed = new EmbedBuilder()
+            {
+                Title = "Leveling System",
+                Description = message.Author.Mention
+            };
+            embed.WithColor(Color.Blue);
+            embed.AddField("Level", cLv);
+            embed.AddField("Current EXP", cEXP);
+            embed.AddField("Required Exp to Level up", rEXP);
+            embed.WithCurrentTimestamp();
+            await message.Channel.SendMessageAsync(embed: embed.Build());
+        }
+        catch
+        {
+            if (Language.ActiveLanguage != null)
+                await message.Channel.SendMessageAsync(Language.ActiveLanguage.LanguageWords["DB_COMMAND_RANK_NO_RANK"]);
+            else await message.Channel.SendMessageAsync("You are unranked now. Please type a message in chat that is not a command and try again this command");
+            return;
+        }
+
+
+    }
+}
+

CMD_LevelingSystem/Items/Leveling System/Core.cs

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+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Threading.Tasks;
+
+public class Core
+{
+
+    public static Dictionary<ulong, string> playerMessages = new Dictionary<ulong, string>();
+
+    private static readonly string folder = @".\Data\Resources\LevelingSystem\";
+
+    public static int GetLevel(ulong id) => int.Parse(File.ReadAllText(Path.Combine(folder, id.ToString() + ".data")).Split(',')[0].Split('=')[1]);
+
+
+    public static Int64 GetExp(ulong id) => Int64.Parse(File.ReadAllText(Path.Combine(folder, id.ToString() + ".data")).Split(',')[1].Split('=')[1]);
+
+
+    public static Int64 GetReqEXP(ulong id) => Int64.Parse(File.ReadAllText(Path.Combine(folder, id.ToString() + ".data")).Split(',')[2].Split('=')[1]);
+    public static void SaveData(ulong id, int lv, Int64 cexp, Int64 rexp)
+    {
+        Directory.CreateDirectory(folder);
+        File.WriteAllText(Path.Combine(folder, id.ToString() + ".data"), $"Level={lv},EXP={cexp},REXP={rexp}");
+    }
+    private static Int64 NextLevelXP(int level)
+    {
+        return (level * level) + 2 * level + 75;
+    }
+
+    public static (bool, int) MessageSent(ulong id, int messageLength)
+    {
+        WaitForTimeToRemoveFromList(id, 60);
+
+        if (!File.Exists(Path.Combine(folder, id.ToString() + ".data")))
+        {
+            SaveData(id, 0, 0, 0);
+        }
+        Int64 cEXp = GetExp(id);
+        Int64 rExp = GetReqEXP(id);
+        int random = new System.Random().Next(3, 6) + messageLength;
+        cEXp += random;
+        if (cEXp >= rExp)
+        {
+            cEXp = cEXp - rExp;
+            int lv = GetLevel(id);
+            rExp = NextLevelXP(lv);
+            lv++;
+            SaveData(id, lv, cEXp, rExp);
+            return (true, lv);
+        }
+
+        SaveData(id, GetLevel(id), cEXp, rExp);
+        return (false, -1);
+    }
+
+    public static async void WaitForTimeToRemoveFromList(ulong id, int time_seconds)
+    {
+        await Task.Delay(time_seconds * 1000);
+        playerMessages.Remove(id);
+    }
+
+}

CMD_LevelingSystem/Items/Leveling System/Data.cs

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+using Discord.WebSocket;
+
+using System;
+using System.IO;
+public static class Data
+{
+    private static readonly string folder = @".\Data\Resources\LevelingSystem\";
+    public static void registerPlayer(SocketGuildUser user)
+    {
+        ulong id = user.Id;
+        Directory.CreateDirectory(folder);
+        File.WriteAllText(Path.Combine(folder, id.ToString() + ".data"), "Level=0,EXP=0,REXP=100");
+    }
+
+    public static int GetLevel(ulong id) => int.Parse(File.ReadAllText(Path.Combine(folder, id.ToString() + ".data")).Split(',')[0].Split('=')[1]);
+
+
+    public static Int64 GetExp(ulong id) => Int64.Parse(File.ReadAllText(Path.Combine(folder, id.ToString() + ".data")).Split(',')[1].Split('=')[1]);
+
+
+    public static Int64 GetReqEXP(ulong id) => Int64.Parse(File.ReadAllText(Path.Combine(folder, id.ToString() + ".data")).Split(',')[2].Split('=')[1]);
+
+
+}