C read INI file and write data to INI file

// Read INI file

[DllImport("kernel32")]

public static extern int GetPrivateProfileString(string section, string key, string def, StringBuilder retVal, int size, string filePath);

// towards ini File write data

[DllImport("kernel32")]

public static extern long WritePrivateProfileString(string mpAppName, string mpkeyName,

string mpDefault, string mpFileName);

// Timed shutdown

[DllImport("user32.dll", ExactSpelling = true, SetLastError = true)]

public static extern bool ExitWindowsEx(int uFlags, int dwReserved);

// close , Restart the system and have all permissions

[DllImport("ntdll.dll", ExactSpelling = true, SetLastError = true)]

public static extern bool RtlAdjustPrivilege(int htok, bool disall, bool newst, ref int len);

/// <summary>
/// from ini Read the specified value in
/// </summary>
/// <param name="section">ini The node of </param>
/// <param name="key"> Items under node </param>
/// <param name="def"> Return the default value if it is not found </param>
/// <param name="filePath"> File path to read </param>
/// <returns> Return the content of the node to be read </returns>
public static string GetIniFileString(string section, string key, string def, string filePath)
{
    StringBuilder temp = new StringBuilder(1024);
    GetPrivateProfileString(section, key, def, temp, 1024, filePath);
    return temp.ToString();
}