I have the following .NET VB code to set and read objects in cache on a per user basis (i.e. a bit like session)

'' Public Shared Sub CacheSet(ByVal Key As String, ByVal Value As Object) Dim userID As String = HttpContext.Current.User.Identity.Name

    HttpContext.Current.Cache(Key & "_" & userID) = Value
End Sub

Public Shared Function CacheGet(ByVal Key As Object)

    Dim returnData As Object = Nothing
    Dim userID As String = HttpContext.Current.User.Identity.Name

    returnData = HttpContext.Current.Cache(Key & "_" & userID)

    Return returnData

End Function

I use these functions to hold user data that I don't want to access the DB for all the time. However, when the data is updated, I want the cached item to be removed so it get created again.

How do I make an Item I set disappear or set it to NOTHING or NULL?

Craig