Base64 encode a Unicode string as a string : Encoding Based64 « I18N Internationalization « C# / CSharp Tutorial

1. C# / CSharp Tutorial
2. I18N Internationalization
3. Encoding Based64

using System;
using System.IO;
using System.Text;

class MainClass
{
    public static void Main() 
    {

        byte[] b = Encoding.Unicode.GetBytes("string");

        // Return the Base64-encoded string.
        string str =  Convert.ToBase64String(b);
        Console.WriteLine(str);

        Convert.FromBase64String(str);

        // Return the decoded Unicode string.
        Console.WriteLine(Encoding.Unicode.GetString(b));


    }
}

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