Session sharing between asp.net and MVC3 application

You can use either State Server or Sql Server to store your session, and it can be shared by asp.net and MVC application.

State Server is little faster than Sql Server.

I tried some different I don't know it's correct way or not but I am satisfied that project is working
My target was to check session expiry.
when I login to my ASP.NET 2 Application I Store 1 user name using normal Session variable
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Session["username"] = txtUserName.Text

I put my MVC3 Solution in that website
In my Controllers Add Delete Update methods was there so when you run MVC Application the Controller and it's method get's called
MVC_APP/TestApp/ADD
Now for this url my Controller was like

public ActionResult ADD()
{
// my code
return View();
}

Now I added one extra parameter

public ActionResult ADD(string userName)
{
if(StringIsnullOrEmpty(userName))
{
   Redirect("Logout.aspx")
}
else
{
// my code
return View();
}
}

In menu click for MVC View
for Eg ADD

Redirect("MVC_APP/testAPP/ADD?userName?="+ Session["userName"])
Redirect("MVC_APP/testAPP/Edit?userName?="+ Session["userName"])

And when anyone clicks on ASP .Net menu automatically view gets called