C#读写ini文件

using System;
using System.Collections.Generic;
using System.Runtime.InteropServices;
using System.Text;

namespace Unlock
{
    class RWIni
    {
        public string Path { get; set; }
        public RWIni(string path)
        {
            this.Path = path;
        }

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

        /// <summary>
        /// 读ini文件
        /// </summary>
        /// <param name="section"></param>
        /// <param name="key"></param>
        /// <returns></returns>
        public string ReadIni(string section, string key)
        {
            StringBuilder temp = new StringBuilder(500);
            int i= GetPrivateProfileString(section, key, "", temp, 500, this.Path);
            return temp.ToString();
        }

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

        /// <summary>
        /// 写ini文件
        /// </summary>
        /// <param name="section"></param>
        /// <param name="key"></param>
        /// <param name="value"></param>
        /// <param name="path"></param>
        public void WriteIni(string section, string key, string value)
        {
            WritePrivateProfileString(section, key, value, this.Path);
        }
    }
}