string getString(int fieldno);

The function getString() returns content of any field as a string value or NULL.
If a field is a binary memo, you need another function: getMemoBuf().
Do not forget to call readRecord().

If dbf file contains non-ASCII symbols, you have to use a similar function and provide a code page:
string getString(int fieldno, EncodingInfo e);

    // your code
    dbf.readRecord( row );
    Console.WriteLine( dbf.getString( 0 ) );
    // your code