Get/Set HttpContext Session Methods in BaseController vs Mocking HttpContextBase to create Get/Set methods - asp.net-mvc

Question

I created Get/Set HttpContext Session Methods in BaseController class and also Mocked HttpContextBase and created Get/Set methods.
Which is the best way to use it.
HomeController : BaseController
{
var value1 = GetDataFromSession("key1")
SetDataInSession("key2",(object)"key2Value");
Or
var value2 = SessionWrapper.GetFromSession("key3");
GetFromSession.SetDataInSession("key4",(object)"key4Value");
}
public class BaseController : Controller
{
public T GetDataFromSession<T>(string key)
{
return (T) HttpContext.Session[key];
}
public void SetDataInSession(string key, object value)
{
HttpContext.Session[key] = value;
}
}
Or
public class BaseController : Controller
{
public ISessionWrapper SessionWrapper { get; set; }
public BaseController()
{
SessionWrapper = new HttpContextSessionWrapper();
}
}
public interface ISessionWrapper
{
T GetFromSession<T>(string key);
void SetInSession(string key, object value);
}
public class HttpContextSessionWrapper : ISessionWrapper
{
public T GetFromSession<T>(string key)
{
return (T) HttpContext.Current.Session[key];
}
public void SetInSession(string key, object value)
{
HttpContext.Current.Session[key] = value;
}
}

Answer 1

The second one seems the best. Although I would probably write those two as extension methods to the HttpSessionStateBase instead of putting them into a base controller. Like this:
public static class SessionExtensions
{
public static T GetDataFromSession<T>(this HttpSessionStateBase session, string key)
{
return (T)session[key];
}
public static void SetDataInSession<T>(this HttpSessionStateBase session, string key, object value)
{
session[key] = value;
}
}
and then inside the controllers, or helpers, or something that has an instance of HttpSessionStateBase use it:
public ActionResult Index()
{
Session.SetDataInSession("key1", "value1");
string value = Session.GetDataFromSession<string>("key1");
...
}
Writing session wrappers is useless in ASP.NET MVC as the HttpSessionStateBase provided by the framework is already an abstract class which could be easily mocked in unit tests.

Answer 2

Just a little correction for the SetDataInSession method of the latest post. In my opinion, it´s a elegant solution! Thanks Darin Dimitrov.
public static class SessionExtensions
{
public static T GetDataFromSession<T>(this HttpSessionStateBase session, string key) {
return (T)session[key];
}
public static void SetDataInSession(this HttpSessionStateBase session, string key, object value) {
session[key] = value;
}
}
First create this class, and after remember to refer its namespace in the Controller class that will call this methods.
When getting the session value:
string value = Session.GetDataFromSession<string>("key1");
The must be a compatible type with the object persisted in the session.