ExchangeServiceBinding service = new ExchangeServiceBinding();
                    service.Credentials = new NetworkCredential("testexchange", "username", "domain");
                    service.RequestServerVersionValue = new RequestServerVersion();
                    service.RequestServerVersionValue.Version = ExchangeVersionType.Exchange2010_SP1;
                    if (!String.IsNullOrEmpty(ExchangeHelper.GetServerName()))
                    {
                        service.Url = ExchangeHelper.GetServerName();
                    }
                    List<EmailAddressType> roomsList = ExchangeHelper.GetRooms(service);
                    DateTime startdate = new DateTime(2011, 01, 01, 09, 30, 00);
                    DateTime enddate = new DateTime(2011, 03, 03, 09, 30, 00);
                    if (roomsList != null && roomsList.Count > 0)
                    {
            //do something
            }