using System;

using System.Text;

public class Program

{

    public static void Main()

    {

        byte[] data_utf8 = { 123, 34, 107, 101, 121, 34, 58, 32, 34, 229, 188, 186, 229, 155, 158, 229, 163, 176, 34, 125 };

​

        Console.WriteLine(string.Join(", ", data_utf8));

        Console.WriteLine(Encoding.UTF8.GetString(data_utf8));

​

        var Ansi_String = Encoding.Default.GetString(data_utf8);

        var Ansi_bytes = Encoding.Default.GetBytes(Ansi_String);

        Console.WriteLine(string.Join(", ", Ansi_bytes));

        Console.WriteLine(Encoding.UTF8.GetString(Ansi_bytes));

    }

}