hello and send messages

Program.cs

@@ -1,6 +1,8 @@
 using dotenv.net;
 using dotenv.net.Utilities;
 using DSharpPlus;
+using DSharpPlus.CommandsNext;
+using DSharpPlus.CommandsNext.Exceptions;
 
 namespace KBot;
 
@@ -19,6 +21,35 @@ class Program
             }
         );
 
+        var commands = discord.UseCommandsNext(
+            new CommandsNextConfiguration() { StringPrefixes = new[] { "," } }
+        );
+
+        commands.RegisterCommands<HelloModule>();
+        commands.RegisterCommands<SendModule>();
+
+        commands.CommandErrored += async (s, e) =>
+        {
+            if (e.Exception is CommandNotFoundException)
+            {
+                await e.Context.RespondAsync("Unknown command!");
+            }
+            else if (e.Exception is ChecksFailedException checksFailed)
+            {
+                await e.Context.RespondAsync("You don't have permission to use this command!");
+            }
+            else if (e.Exception is ArgumentException)
+            {
+                var command = commands.FindCommand("help " + e.Command?.Name, out string? str);
+                var ctx = commands.CreateContext(e.Context.Message, "", command, str);
+                await command?.ExecuteAsync(ctx);
+            }
+            else
+            {
+                await e.Context.RespondAsync($"An error occurred: {e.Exception.GetType().Name}");
+            }
+        };
+
         await discord.ConnectAsync(new DSharpPlus.Entities.DiscordActivity("bing chillin"));
         await Task.Delay(-1);
     }