Added a demo that connects to a channel to print user changes and bit cheers.

TwitchIrcClient/Program.cs

@@ -1 +1,62 @@
-
+using System.Collections.Concurrent;
+using System.Reflection.Metadata;
+using System.Security.AccessControl;
+using System.Threading.Channels;
+using TwitchIrcClient.IRC;
+using TwitchIrcClient.IRC.Messages;
+
+RateLimiter limiter = new(20, 30);
+bool ssl = true;
+async Task<IrcConnection> CreateConnection(string channel)
+{
+    IrcConnection connection;
+    if (ssl)
+        connection = new IrcConnection("irc.chat.twitch.tv", 6697, limiter, true, true);
+    else
+        connection = new IrcConnection("irc.chat.twitch.tv", 6667, limiter, true, false);
+    connection.AddCallback(new MessageCallbackItem(
+        (o, m) =>
+        {
+            if (m is Privmsg priv)
+            {
+                if (priv.Bits > 0)
+                    lock (Console.Out)
+                        Console.WriteLine($"{priv.DisplayName}: {priv.Bits}{Environment.NewLine}");
+            }
+            else
+                throw new ArgumentException("Received an unrequested message type", nameof(m));
+        }, [IrcMessageType.PRIVMSG]));
+    connection.onUserChange += (object? o, UserChangeEventArgs args) =>
+    {
+        lock (Console.Out)
+        {
+            var resetColor = Console.BackgroundColor;
+            Console.BackgroundColor = ConsoleColor.DarkGreen;
+            Console.WriteLine(string.Join(", ", args.Joined.Order()));
+            Console.BackgroundColor = ConsoleColor.DarkRed;
+            Console.WriteLine(string.Join(", ", args.Left.Order()));
+            Console.BackgroundColor = resetColor;
+            Console.WriteLine();
+        }
+    };
+    if (!await connection.ConnectAsync())
+    {
+        Console.WriteLine("failed to connect");
+        Environment.Exit(-1);
+    }
+    connection.Authenticate(null, null);
+    connection.SendLine("CAP REQ :twitch.tv/commands twitch.tv/membership twitch.tv/tags");
+    connection.JoinChannel(channel);
+    return connection;
+}
+Console.Write("Channel: ");
+var channelName = Console.ReadLine();
+ArgumentNullException.ThrowIfNull(channelName, nameof(Channel));
+var connection = CreateConnection(channelName);
+while (true)
+{
+    //all the work happens in other threads
+    //specifically the threadpool used by Task.Run for
+    //the tasks owned by the IrcConnection
+    await Task.Delay(1000);
+}