C#操作INI文件

using System;using System.Collections.Specialized;using System.IO;using System.Runtime.InteropServices;using System.Text;namespace IniFileTest{    public class INI    {        const int COUNT = 0xFFFF;        [DllImport("kernel32")]        PRivate static extern bool WritePrivateProfileString(string section, string key, string val, string filePath);        [DllImport("kernel32")]        private static extern int GetPrivateProfileString(string section, string key, string def, byte[] buffer, int size, string filePath);        /// <summary>        /// ini关联的文件        /// </summary>        private string FileName;        public INI(string filename)        {            FileInfo file = new FileInfo(filename);            if (file.Exists)            {                FileName = new FileInfo(filename).FullName;            }        }        /// <summary>        /// 删除Section        /// </summary>        /// <param name="SectionName"></param>        /// <returns></returns>        public bool EraseSection(string SectionName)        {            return WritePrivateProfileString(SectionName, null, null, FileName);        }        /// <summary>        /// 写入section 键值对，如果没有section 则创建并写入        /// </summary>        /// <param name="section"></param>        /// <param name="key"></param>        /// <param name="value"></param>        /// <returns></returns>        public bool Write(string section, string key, string value)        {            return WritePrivateProfileString(section, key, value, FileName);        }        /// <summary>        /// 删除键        /// </summary>        /// <param name="section"></param>        /// <param name="key"></param>        /// <returns></returns>        public bool EraseKey(string section, string key)        {            return WritePrivateProfileString(section, key, null, FileName);        }        /// <summary>        /// 获取所有section        /// </summary>        /// <returns></returns>        public StringCollection GetSections()        {            StringCollection sections = new StringCollection();            byte[] buffer = new byte[COUNT];            int length = GetPrivateProfileString(null, null, null, buffer, COUNT, FileName);            int start = 0;            for (int i = 0; i < length; i++)            {                if (buffer[i] == 0 && i > start)                {                    string str = Encoding.Default.GetString(buffer, start, i - start);                    sections.Add(str);                    start = i + 1; ;                }            }            return sections;        }        /// <summary>        /// 获取section下的所哟keys        /// </summary>        /// <param name="section"></param>        /// <returns></returns>        public StringCollection GetSectionKeys(string section)        {            StringCollection keys = new StringCollection();            byte[] buffer = new byte[COUNT];            int length = GetPrivateProfileString(section, null, null, buffer, COUNT, FileName);            int start = 0;            for (int i = 0; i < length; i++)            {                if (buffer[i] == 0 && i > start)                {                    string str = Encoding.Default.GetString(buffer, start, i - start);                    keys.Add(str);                    start = i + 1; ;                }            }            return keys;        }        /// <summary>        /// 查寻指定的key的值,没有则返回defaultvalue        /// </summary>        /// <param name="section"></param>        /// <param name="key"></param>        /// <param name="defaultvalue"></param>        /// <returns></returns>        public String GetValue(String section, string key, string defaultvalue)        {            byte[] bytes = new byte[COUNT];            int s = GetPrivateProfileString(section, key, defaultvalue, bytes, COUNT, FileName);            string str = Encoding.GetEncoding(0).GetString(bytes, 0, s);            return defaultvalue;        }     }}