C# StreamReader检测&#x2；XML文件的编码

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

public class Program
{
    public static void Main()
    {
        string filePath = "path/to/xml/file.xml";
        
        using (StreamReader reader = new StreamReader(filePath, true))
        {
            // 读取文件的前几个字节
            char[] buffer = new char[4];
            reader.Read(buffer, 0, 4);
            
            // 根据读取的字节判断编码方式
            Encoding encoding = DetectEncoding(buffer);
            
            Console.WriteLine("XML文件的编码方式为：" + encoding.EncodingName);
        }
    }
    
    // 检测编码方式
    private static Encoding DetectEncoding(char[] buffer)
    {
        if (buffer.Length >= 2 && buffer[0] == '<' && buffer[1] == '?')
        {
            if (buffer.Length >= 4 && buffer[2] == 'x' && buffer[3] == 'm' && buffer[4] == 'l')
            {
                return Encoding.UTF8;
            }
            else
            {
                return Encoding.Unicode;
            }
        }
        else
        {
            return Encoding.Default;
        }
    }
}