HttpContextBase context

Trying to get an explanation in the code bellow: Hope someone can help.

public string GetCartId(HttpContextBase context)
        {
            if (context.Session[CartSessionKey] == null)
            {
                if (!string.IsNullOrWhiteSpace(context.User.Identity.Name))
                {
                    context.Session[CartSessionKey] =
                        context.User.Identity.Name;
                }
                else
                {
                    // Generate a new random GUID using System.Guid class
                    Guid tempCartId = Guid.NewGuid();
                    // Send tempCartId back to client as a cookie
                    context.Session[CartSessionKey] = tempCartId.ToString();
                }
            }
            return context.Session[CartSessionKey].ToString();

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yguyon28Asked:
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Carl TawnConnect With a Mentor Systems and Integration DeveloperCommented:
It is basically a function that looks in the session for a value referenced by a constant called CartSessionKey. If it doesn't exist it checks to see if there is a current user - if there is it users their name as the cart key, otherwise it generates a new Guid. Finally it returns the Cart Key value to the called.

The HttpContextBase part is just a means of passing the current HttpContext to a method that isn't in a page.
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