问导出和导入时的数据编码和解码

EN

class Program
{
    static void Main(string[] args)
    {
        var writeText = "你叫什么名字？";
        var writeBytes = System.Text.UTF8Encoding.Unicode.GetBytes(writeText);
        File.WriteAllBytes("D:\\test.txt", writeBytes);

        var readBytes = File.ReadAllBytes("D:\\test.txt");
        var readText = System.Text.UTF8Encoding.Unicode.GetString(readBytes);
        Console.WriteLine(readText);
    }
}

private string Decoder(string originFilePath)
{
   using (var sr = new StreamReader(originFilePath, Encoding.GetEncoding("utf-8")))
   {
      return sr.ReadToEnd();
   }
}