How to save unicode data to oracle?

Question

I am trying to save unicode data (greek) in oracle database (10 g). I have created a simple table:

I understand that NVARCHAR2 always uses UTF-16 encoding

Answer 1

On reading records, try

Encoding utf = Encoding.Default;   
var utfBytes = odatareader.GetOracleString(0).GetNonUnicodeBytes();//OracleDataReader
Console.WriteLine(utf.GetString(utfBytes));