using an Array in a Switch Statement

I have this code:
        string strSessionPageID = Session["SessionPageID"].ToString();

        switch (strSessionPageID)
        {
            case "3":
                //do x
                break;
            case "5":
                //do y
                break;
        }

what I'd like to be able to do is set up arrays, and use the switch like this:

        string strSessionPageID = Session["SessionPageID"].ToString();

        array xArr = array("3","43","56","68");
        array yArr = array("34","42","51","63");

        switch (strSessionPageID)
        {
            case xArr:
                //do x
                break;
            case yArr:
                //do y
                break;
        }

where I use the ID in the switch, and check it against the arrays to determine the case to perform.

Is there a way to do this, and if so, might I have an example?