用C#读取，写入ini文件

       [DllImport("kernel32.dll")]
        private static extern bool WritePrivateProfileString(string section, string key, string val, string filePath);
        [DllImport("kernel32.dll")]
        private static extern int GetPrivateProfileString(string section, string key, string def, StringBuilder retVal, int size, string filePath);
        private string sPath_ = "";
        /// <summary>
        /// 绝对路径
        /// </summary>
        public string sPath
        {
            get { return sPath_; }
            set { sPath_ = value; }
        }

        /// <summary>
        /// 向ini文件进行写入
        /// </summary>
        /// <param name="section">文件域</param>
        /// <param name="key">key值</param>
        /// <param name="value">value值</param>
        /// <returns></returns>
        public bool WriteToIni(string section, string key, string value)
        {
            bool result = false;
            if (System.IO.File.Exists(sPath))
            {
                result = WritePrivateProfileString(section, key, value, sPath);
            }
            return result;
        }

        /// <summary>
        /// 从ini文件进行读取
        /// </summary>
        /// <param name="section">文件域</param>
        /// <param name="key">key值</param>
        /// <param name="defaultValue">默认值</param>
        /// <returns></returns>
        public string ReadFromIni(string section, string key, string defaultValue = "")
        {
            string result = defaultValue;
            if (System.IO.File.Exists(sPath))
            {
                StringBuilder sTemp = new StringBuilder(1024);
                int i = GetPrivateProfileString(section, key, defaultValue, sTemp, 1024, sPath);
                result = sTemp.ToString();
            }
            return result;
        }

强烈注意：

ini文件必须为ANSI、Unicode 格式，否则会出现异常，至于原因暂时没有找到。请大侠帮忙解释。