VB.net/asp.net: save Session as ArrayList

Question

I want to save some strings in a Session("myKey") as an ArrayList in my asp.net application.

So I have somthing like that:

Dim s As String = "String1"

If I use

Session("myKey") = s

it is working for the moment.

After PostBack I want to add another string to the session.

If do the same thing again, then i will overwrite my Sessiondata.

So I'm searching for something like this:

Dim s As String = "String1"
TryCast(Session("myKey"), ArrayList).Add(s)

In this case the Sessiondata would be stored correctly, but my code is not correct.

Answer 1

I've tried and found a solution by myself;

Dim s As String = "String1"

  If Session("myKey") Is Nothing Then
        Session("myKey") = New ArrayList
  End If

TryCast(Session("myKey"), ArrayList).Add(s)

Don't know if it is the usual way, but it is working.