SAConnection conn = new SAConnection( "Data Source=SQL Anywhere 12 Demo" );
conn.Open();
SACommand cmd = new SACommand("SELECT * FROM MarketingInformation", conn);
SADataReader reader = cmd.ExecuteReader();

int idValue;
int productIdValue;
int length = 100;
char[] buf = new char[length];
while (reader.Read())
{
    idValue = reader.GetInt32(0);
    productIdValue = reader.GetInt32(1);
    long blobLength = 0;
    long charsRead;
    while ((charsRead = reader.GetChars(2, blobLength, buf, 0, length))
            == (long)length)
    {
        blobLength += charsRead;
    }
    blobLength += charsRead;
}
reader.Close();
conn.Close();