Lidgren example

Chat.cs

static class Chat {
	static NetPeerConfiguration Cfg;
	static NetPeer Peer;

	public static void Init(bool IsServer, int Port) {
		if (Cfg == null) {
			Cfg = new NetPeerConfiguration("LidgrenTest");
			Cfg.EnableMessageType(NetIncomingMessageType.ConnectionApproval);
			Cfg.Port = Port;
		}

		if (Peer == null) {
			if (IsServer)
				Peer = new NetServer(Cfg);
			else
				Peer = new NetClient(Cfg);

			Peer.Start();
		}
	}

	public static void Connect(string Host, int Port) {
		if (!(Peer is NetClient))
			return;

		NetOutgoingMessage Approval = Peer.CreateMessage();
		Approval.Write("Hello! I am a client, i want to connect!");
		Peer.Connect(Host, Port, Approval);
	}

	public static void SendMessage(string Msg) {
		Forme.WriteLine("You: " + Msg, Color.Blue);

		NetOutgoingMessage Packet = Peer.CreateMessage();
		Packet.Write(Msg);

		(Peer as NetClient)?.SendMessage(Packet, NetDeliveryMethod.ReliableOrdered);
		(Peer as NetServer)?.SendToAll(Packet, NetDeliveryMethod.ReliableOrdered);
	}

	public static void Disconnect() {
		(Peer as NetClient)?.Disconnect("Goodbyte fage!");
	}

	public static void Update() {
		if (Peer == null)
			return;

		NetIncomingMessage Msg;
		while ((Msg = Peer.ReadMessage()) != null) {
			switch (Msg.MessageType) {
				case NetIncomingMessageType.ConnectionApproval:
					Forme.WriteLine("Received connection message: " + Msg.ReadString(), Color.Green);
					Msg.SenderConnection.Approve();
					break;

				case NetIncomingMessageType.StatusChanged:
					Forme.WriteLine("Status changed: " + Msg.SenderEndPoint.ToString() + ", " + Msg.SenderConnection.Status, Color.Green);
					break;

				case NetIncomingMessageType.Data:
					Forme.WriteLine("Stranger: " + Msg.ReadString(), Color.Red);
					break;

				default:
					break;
			}

			Peer.Recycle(Msg);
		}
	}
}