Cant find SignalR Hub Class in Add New Item dialog

There is no need to install that package every time.
Download compatible version of SignalR, copy following dll files from package folder which is already installed in your project and copy these files in bin folder of a project.

Microsoft.AspNet.SignalR.Core.dll

Microsoft.AspNet.SignalR.Owin.dll

Microsoft.AspNet.SignalR.SystemWeb.dll

Microsoft.Owin.Host.SystemWeb.dll

Microsoft.Web.Infrastructre.dll

Newtonsoft.Json.dll

Owin.dll

then Add Refrences to these dll files.

Add a new class file called LetsHub.cs.

In that file i wrote the following code,

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using Microsoft.AspNet.SignalR.Hubs;
using Microsoft.AspNet.SignalR;

namespace demo.Hubs
{
[HubName("chatHub")]
public class LetsChat : Hub
{
public void SendMsg(string Message)
{
Clients.All.addMessage(Message);
}
}
}