要用到API函数，最好写个读取INI文件的类

太简单了吧，能否详细点，
有代码吗？

C#读取ini 
using System;
using System.IO;
using System.Runtime.InteropServices;
using System.Text;

namespace WindowsApplication6
{
    /// <summary>
    /// iniClass 的摘要说明。
    /// </summary>
            // TODO: 在此处添加构造函数逻辑
            public class INIClass
            {
                public string inipath;
                [DllImport("kernel32")]
                private static extern long WritePrivateProfileString(string section,string key,string val,string filePath);
                [DllImport("kernel32")]
                private static extern int GetPrivateProfileString(string section,string key,string def,StringBuilder retVal,int size,string filePath);
                /// <summary>
                /// 构造方法
                /// </summary>
                /// <param name="INIPath">文件路径</param>
                public INIClass(string INIPath)
                {
                    inipath = INIPath;
                }
                /// <summary>
                /// 写入INI文件
                /// </summary>
                /// <param name="Section">项目名称(如 [TypeName] )</param>
                /// <param name="Key">键</param>
                /// <param name="Value">值</param>
                public void IniWriteValue(string Section,string Key,string Value)
                {
                    WritePrivateProfileString(Section,Key,Value,this.inipath);
                }
                /// <summary>
                /// 读出INI文件
                /// </summary>
                /// <param name="Section">项目名称(如 [TypeName] )</param>
                /// <param name="Key">键</param>
                public string IniReadValue(string Section,string Key)
                {
                    StringBuilder temp = new StringBuilder(500);
                    int i = GetPrivateProfileString(Section,Key,"",temp,500,this.inipath);
                    return temp.ToString();
                }
            }

            //
        }