using System;

using System.Text;

public class Program

{

    public static void Main()

    {

        string text = "中文字";

        Encoding.RegisterProvider(CodePagesEncodingProvider.Instance);

        Encoding big5 = Encoding.GetEncoding(950); 

        Console.WriteLine($"Name : {big5.EncodingName} , CodePage :{big5.CodePage}");

        byte[] bytedText = Encoding.UTF8.GetBytes(text);

        byte[] bytedResult = Encoding.Convert(Encoding.UTF8, big5, bytedText);

        string result = big5.GetString(bytedResult);

        Console.WriteLine($"{result}");

        Console.ReadKey();

    }

}