C#

codice:
public static class globalValues
{
      private static string _ConnString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + HttpContext.Current.Server.MapPath("~/App_Data/campi.mdb");       
      public static string ConnString
      {
            get { return _ConnString; }
            set { _ConnString = value; }
      }
}

Da una qualsiasi pagina:
codice:
protected void Page_Load(object sender, EventArgs e)
{
   String a = globalValues.ConnString;
}