In this post, I will show you how to create a simple chat application using the Microsoft SignalR framework
Step1
open visual studio and create a new MVC application 
Step2
Select Empty MVC application
Step3
Open Package Manager Console and install SignalR
Step4
Right-click on the project and add a new class ChatHub and inherit from the Hub class that resides in
Microsoft.AspNet.SignalR
public class ChatHub:Hub
{
//this method is called when client send message
public void sendMessage(string message)
{
//this method brodcast message to all connected client
Clients.All.newMessage(message);
}
}
Step5
Right-click on the project and add a new class named Startup and add the following code inside it
public class Startup
{
public void Configuration(IAppBuilder app)
{
app.MapSignalR();
}
}
Create a new html page and add following markup inside it.You can see that I have added three JavaScript lib :jquery,jqery-signalr* and signalr/hubs.Signalr/hubs contains functions for interacting with server side hub class and also it generated automatically by signalr framework
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title></title>
<script src="Scripts/jquery-1.6.4.min.js"></script>
<script src="Scripts/jquery.signalR-2.2.0.js"></script>
<script src="signalr/hubs"></script>
<script>
$(document).ready(function () {
var chatHub = $.connection.chatHub;
chatHub.client.newMessage = function (data) {
$("#messages").append("<li>" + data + "</li>");
};
chatHub.connection.start().done(function () {
$("#btnSend").click(function () {
chatHub.server.sendMessage($("#txtMessage").val());
});
});
});
</script>
</head>
<body>
<label for="txtMessage">Message</label>
<input type="text" name="txtMessage" id="txtMessage" />
<input type="button" value="send" id="btnSend" />
<hr />
<ul id="messages"></ul>
</body>
</html>