private void GetOracleBFile(string connectionString)
{
    //Create and open the connection.
    using (OracleConnection connection = new OracleConnection(connectionString))
    {
        connection.Open();

        //Create and execute the commands.
        OracleCommand command = connection.CreateCommand();
        command.CommandText = "CREATE OR REPLACE DIRECTORY TestDir AS 'c:\\bfiles'";
        command.ExecuteNonQuery();
        command.CommandText = "CREATE TABLE TestTable(col1 number, col2 BFILE)";
        command.ExecuteNonQuery();
        command.CommandText = "INSERT INTO TestTable VALUES ('2', BFILENAME('TESTDIR', 'File.jpg'))";
        command.ExecuteNonQuery();
        command.CommandText = "SELECT * FROM TestTable";

        //Read the BFile data.
        byte[] buffer = new byte[100];
        OracleDataReader dataReader = command.ExecuteReader();
        using (dataReader)
        {
            if (dataReader.Read())
            {
                OracleBFile BFile = dataReader.GetOracleBFile(1);
                using (BFile)
                {
                    BFile.Seek(0, SeekOrigin.Begin);
                    BFile.Read(buffer, 0, 100);
                }
            }
        }
    }
    return;
}