Async library for .NET to help build real-time, multi-user interactive web applications.

The real-time web is a set of technologies and practices that enable users to receive information as soon as it is published by its authors, rather than requiring that they or their software check a source periodically for updates.

PM> Install-Package SignalR.Sample

PM> Install-Package SignalR

Microsoft.Web.Infrastructure
Newtonsoft.Json
SignalR
SignalR.Hosting.AspNet
SignalR.Hosting.Common

jquery-1.6.4.js
jquery.signalR-0.5.1.js

using SignalR.Hubs;
namespace SimpleChatWithSignalR
{
  public class SimpleChat : Hub
  {
    public void SendMessage(string message)
    {
      Clients.reciveMessage(message);
    }
  }
} 

<input type="text" id="msg" />
<input type="button" value="Send" id="send" /><br />
<textarea id='messages' readonly="true" style="height: 200px; width: 200px;"></textarea>
<script src="Scripts/jquery-1.6.4.min.js" type="text/javascript"></script>
<script src="Scripts/jquery.signalR-0.5.1.min.js" type="text/javascript"></script>
<script src="signalr/hubs" type="text/javascript"></script>
<script type="text/javascript">
  var chat = $.connection.simpleChat;
  chat.reciveMessage = function (msg) {
   $('#messages').val($('#messages').val() + "-" + msg + "\r\n"); 
  };
  $.connection.hub.start();
  $('#send').click(function () {
    chat.sendMessage($('#msg').val());
  });
</script>

<script src="signalr/hubs" type="text/javascript"></script>