C#——INI文件操作

using System;
using System.Text;
using System.IO;
using System.Runtime.InteropServices;
using System.Collections.Generic;
public class OperateIniFile
    {
   
        private static String filePath = "";
		#region API函数声明

        [DllImport("kernel32")]
        private static extern long WritePrivateProfileString(string section, string key,
            string val, string filePath);
　　　　  //需要调用GetPrivateProfileString的重载
        [DllImport("kernel32", EntryPoint = "GetPrivateProfileString")]
        private static extern long GetPrivateProfileString(string section, string key,
            string def, StringBuilder retVal, int size, string filePath);

        [DllImport("kernel32", EntryPoint = "GetPrivateProfileString")]
        private<