C#使用utf-8读取ini

using System.Runtime.InteropServices;
class IniFile
    {
        public IniFile(string filePath)
        {
            m_FilePath = filePath;
        }

        private string m_FilePath;

        [DllImport("kernel32")]
        private static extern bool WritePrivateProfileString(byte[] section, byte[] key, byte[] val, string filePath);

        [DllImport("kernel32")]
        private static extern int GetPrivateProfileString(byte[] section, byte[] key, byte[] def, byte[] retVal, int size, string filePath);

        //与ini交互必须统一编码格式
        private byte[] getBytes(string s, string encodingName)
        {
            return null == s ? null : Encoding.GetEncoding(encodingName).GetBytes(s);
        }

        public string ReadString(string section, string key, string defaultVal = "", int size = 1024, string encodingName = "utf-8")
        {
            byte[] buffer = new byte[size];
            int count = GetPrivateProfileString(getBytes(section, encodingName), getBytes(key, encodingName), 
                getBytes(defaultVal, encodingName), buffer, size, m_FilePath);
            return Encoding.GetEncoding(encodingName).GetString(buffer, 0, count).Trim();
        }

        public bool WriteString(string section, string key, string value, string encodingName = "utf-8")
        {
            return WritePrivateProfileString(getBytes(section, encodingName), getBytes(key, encodingName), getBytes(value, encodingName), m_FilePath);
        }
    }

IniFile iniGate = new IniFile("E:\\test.ini");
string Id = iniGate.ReadString("server", "Id");
string LineIp = iniGate.ReadString("server", "LineIp");
string Ip = iniGate.ReadString("address", "Ip");

iniGate.WriteString("server", "title", "五线");test.ini

[server]
Id        = 3
title        = 一线

[address]
Ip            = localhost