C#操作.ini文件

INI文件是一种按照特点方式排列的文本文件。

每一个INI文件构成都非常类似，由若干段落（section）组成，

在每个带括号的标题下面，是若干个以单个单词开头的关键词（keyword）和一个等号，

等号右边的就是关键字对应的值（value）。其一般形式如下：
[section1]
 keyword1=value1 
 keyword2=value2
 keyword3=value3
[section2]
 keyword1=value1
 keyword2=value2

    public class IniControlClass
    {
        [DllImport("kernel32.dll", CharSet = CharSet.Auto)]
        public static extern int GetPrivateProfileSectionNames(IntPtr lpszReturnBuffer, uint nSize, string lpFileName);
        [DllImport("kernel32.dll", CharSet = CharSet.Auto)]
        public static extern uint GetPrivateProfileString(string lpAppName, string lpKeyName, string lpDefault, StringBuilder lpReturnedString, int nSize, string lpFileName);
        [DllImport("kernel32.dll", CharSet = CharSet.Auto)]
        public static extern uint GetPrivateProfileString(string lpAppName, string lpKeyName, string lpDefault, [In, Out] char[] lpReturnedString, int nSize, string lpFileName);
        [DllImport("kernel32.dll", CharSet = CharSet.Auto)]
        public static extern int GetPrivateProfileString(string lpAppName, string lpKeyName, string lpDefault, IntPtr lpReturnedString, uint nSize, string lpFileName);
        [DllImport("kernel32.dll", CharSet = CharSet.Auto)]
        public static extern int GetPrivateProfileInt(string lpAppName, string lpKeyName, int lpDefault, string lpFileName);
        [DllImport("kernel32.dll", CharSet = CharSet.Auto)]
        public static extern int GetPrivateProfileSection(string lpAppName, IntPtr lpReturnedString, uint nSize, string lpFileName);
        [DllImport("kernel32.dll", CharSet = CharSet.Auto, SetLastError = true)]
        public static extern bool WritePrivateProfileString(string lpAppName, string lpKeyName, string lpString, string lpFileName);
    }