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What is the difference between these 2 piece of codes.
HttpContext.Current.Session["myvariable"]
Session["myvariable"]
asp.net 4.0 and C# 4.0
They’re effectively the same, in that they will access the same Session data.
The reason you can call
Sessionin your code-behind is because ASP.Net pages by default extend theSystem.Web.UI.Pagetype. This has aSessionpublic property. If you look at the code for this in Reflector you can see that it just callsHttpContext.Current.Sessionitself (through its ownContextproperty).In other classes you will not have access to that property, but you can use
HttpContext.Current.Sessionto access the session data instead, as long as you’re running in the context of a web application.