Consensus: SignalR + TypeScript found here http://coderjournal.com/2013/07/signalr-and-typescript/

## consensus.pokerRoom.ts
/// <reference path="typings/jquery/jquery.d.ts" />
/// <reference path="typings/signalr/signalr.d.ts" />

interface IPokerRoomClient {
	userChanged(user: Consensus.PokerUser);
	userRemoved(user: Consensus.PokerUser);

	resetRoom(room: Consensus.PokerRoom);
	showAllCards(show: boolean);
	roomTopicChanged(topic: string);
	cardChanged(card: Consensus.PokerCard);
}

interface IPokerRoomServer {
	join(user: Consensus.PokerUser): JQueryPromise;
	joinRoom(room: Consensus.PokerRoom): JQueryPromise;
	leaveRoom(room: Consensus.PokerRoom, user: Consensus.PokerUser): JQueryPromise;

	resetRoom(room: Consensus.PokerRoom): JQueryPromise;
	showAllCards(room: Consensus.PokerRoom, show: boolean): JQueryPromise;
	changeRoomTopic(room: Consensus.PokerRoom, topic: string): JQueryPromise;
	changedCard(room: Consensus.PokerRoom, value: string): JQueryPromise;
}

interface HubProxy {
	client: IPokerRoomClient;
	server: IPokerRoomServer;
}

interface SignalR {
	poker: HubProxy;
}

module Consensus {
	export class PokerUser {
		public Name: string;
		public Email: string;
		public Disconnected: string;
	}

	export class PokerRoom {
		public Name: string;
		public Topic: string;
		public Users: PokerUser[];
		public Cards: PokerCard[];
	}

	export class PokerCard {
		public User: PokerUser;
		public Value: string;
	}
}

## Poker.cs
namespace Consensus.Hubs
{
	public class Poker : Hub
	{
		private static readonly Logger _logger = LogManager.GetCurrentClassLogger();

		private static Dictionary<string, PokerUser> _users = new Dictionary<string, PokerUser>();
		private static List<PokerRoom> _rooms = new List<PokerRoom>();

		public PokerUser Join(PokerUser user)
		{
			_logger.Info("{0} joined consensus", user.Email);

			var userRef = _users.Where(x => x.Value.Email == user.Email).Select(x => new {
				ConnectionId = x.Key,
				User = x.Value
			}).FirstOrDefault();

			if (userRef != null && userRef.ConnectionId != Context.ConnectionId)
				_users.Remove(userRef.ConnectionId);

			user = _users.Where(x => x.Key == Context.ConnectionId).Select(x => x.Value).FirstOrDefault() ?? user;

			if (!_users.ContainsKey(Context.ConnectionId))
				_users.Add(Context.ConnectionId, user);

			return user;
		}

		public PokerRoom JoinRoom(PokerRoom room)
		{
			var user = _users.Where(x => x.Key == Context.ConnectionId).Select(x => x.Value).FirstOrDefault();

			if (user == null)
				throw new Exception("No user with this connection Id has joined yet.");

			_logger.Info("{0} joined {1} room", user.Email, room.Name);

			room = _rooms.FirstOrDefault(x => x.Name == room.Name) ?? room;

			if (!_rooms.Contains(room))
				_rooms.Add(room);

			if (room.Users.All(x => x.Email != user.Email)) {
				room.Users.Add(user);
			}

			// tell the people in this room that you've joined
			Clients.Group(room.Name).userChanged(user);

			Groups.Add(Context.ConnectionId, room.Name);

			return room;
		}

		private void AssertContextUserJoinedRoom(string roomName)
		{
			var user = _users.Where(x => x.Key == Context.ConnectionId).Select(x => x.Value).FirstOrDefault();

			if (user == null)
				throw new Exception("No user with this connection Id has joined yet.");

			var room = _rooms.FirstOrDefault(x => x.Name == roomName);

			if (room == null)
				throw new Exception("No room with this name exists.");

			if (room.Users.All(x => x.Email != user.Email)) {
				throw new Exception("User hasn't joined this room yet.");
			}
		}

		public void LeaveRoom(PokerRoom room, PokerUser user)
		{
			AssertContextUserJoinedRoom(room.Name);
			room = _rooms.FirstOrDefault(x => x.Name == room.Name);

			if (room.Users.All(x => x.Email != user.Email))
				throw new Exception("User being removed hasn't joined this room yet.");

			room.Users = room.Users.Where(x => x.Email != user.Email).ToList();
			room.Cards = room.Cards.Where(x => x.User.Email != user.Email).ToList();

			// tell the people in this room that user has been removed
			Clients.Group(room.Name).userRemoved(user);
		}

		public void ResetRoom(PokerRoom room)
		{
			AssertContextUserJoinedRoom(room.Name);

			room = _rooms.FirstOrDefault(x => x.Name == room.Name);
			room.Topic = "";
			room.Cards = new List<PokerCard>();

			// tell the people in this room that the topic has changed
			Clients.Group(room.Name).resetRoom(room);
		}

		public void ShowAllCards(PokerRoom room, bool show)
		{
			AssertContextUserJoinedRoom(room.Name);

			// tell the people in this room that the topic has changed
			Clients.Group(room.Name).showAllCards(show);
		}

		public void ChangeRoomTopic(PokerRoom room, string topic)
		{
			AssertContextUserJoinedRoom(room.Name);

			room = _rooms.FirstOrDefault(x => x.Name == room.Name);
			room.Topic = topic;

			// tell the people in this room that the topic has changed
			Clients.Group(room.Name).roomTopicChanged(topic);
		}

		public void ChangedCard(PokerRoom room, string cardValue)
		{
			AssertContextUserJoinedRoom(room.Name);

			var user = _users.Where(x => x.Key == Context.ConnectionId).Select(x => x.Value).FirstOrDefault();
			room = _rooms.FirstOrDefault(x => x.Name == room.Name);

			var card = room.Cards.FirstOrDefault(x => x.User.Email == user.Email);

			if (card == null) {
				card = new PokerCard {
					User = user,
					Value = cardValue
				};
				room.Cards.Add(card);
			}

			card.Value = cardValue;

			// tell the people in this room that your card has changed
			Clients.Group(room.Name).cardChanged(card);
		}

		public override Task OnDisconnected()
		{
			var user = _users.Where(x => x.Key == Context.ConnectionId).Select(x => x.Value).FirstOrDefault();

			if (user != null) {
				user.Disconnected = DateTimeOffset.UtcNow;

				// tell the people in this room that you've been disconnected
				foreach(var room in _rooms.Where(x => x.Users.Contains(user)))
					Clients.Group(room.Name).userChanged(user);
			}

			return base.OnDisconnected();
		}
	}
}

## PokerCard.cs
namespace Consensus.Models
{
	public class PokerCard
	{
		public PokerUser User { get; set; }
		public string Value { get; set; }
	}
}

## PokerRoom.cs
namespace Consensus.Models
{
	public class PokerRoom
	{
		public PokerRoom()
		{
			Users = new List<PokerUser>();
			Cards = new List<PokerCard>();
		}

		public string Name { get; set; }
		public string Topic { get; set; }

		public virtual ICollection<PokerUser> Users { get; set; }
		public virtual ICollection<PokerCard> Cards { get; set; }
	}
}

## PokerUser.cs
namespace Consensus.Models
{
	public class PokerUser
	{
		public string Name { get; set; }
		public string Email { get; set; }

		public DateTimeOffset? Disconnected { get; set; }
	}
}