c# ini

[DllImport("kernel32")] 
private static extern int GetPrivateProfileString(string section, string key, string def, StringBuilder retVal, int size, string filePath); 
[DllImport("kernel32")] 
private static extern long WritePrivateProfileString(string section, string key, string val, string filePath);


public void iniTest() 
{ 
    StringBuilder str = new StringBuilder(); 

    //쓰기
    WritePrivateProfileString("LOGIN", "ID", "1111111", "./init.ini"); 

    //읽기
    GetPrivateProfileString("LOGIN", "ID", "(NONE)", str, 1024, "./init.ini"); 

    MessageBox.Show(str.ToString()); 

    //삭제
    WritePrivateProfileString("LOGIN", null, null, "./init.ini");
}