Setting folder rights using DirectorySecurity gives 'This platform is not supported' error

Hi,

I'm creating a game which requires shared data between users that can be logged into the users Windows/Mac, e.g. a highscore system.

I'm using this code to set the read/write/execute user rights to the C:\ProgramData\GameFolder\ folder, so that everyone on the system can access the files correctly (if I don't do this, if a limited access user creates the folder, no other user on the computer can access it):

public void SetAccessRights(string folder) { // only do this on Windows if (Application.platform == RuntimePlatform.WindowsPlayer || Application.platform == RuntimePlatform.WindowsEditor) { // create security DirectorySecurity ds = new DirectorySecurity();

     // 'Users' group
     ds.AddAccessRule(new FileSystemAccessRule("S-1-5-32-545", FileSystemRights.FullControl, AccessControlType.Allow));

     // 'Everyone' group
     ds.AddAccessRule(new FileSystemAccessRule("S-1-1-0", FileSystemRights.FullControl, AccessControlType.Allow));

     // set folder with correct user rights
     DirectoryInfo di = new DirectoryInfo(folder);

     di.SetAccessControl(ds);
 }

}

The problem is that on this line:

DirectorySecurity ds = new DirectorySecurity();

Unity gives this exception:

PlatformNotSupportedException: This platform is not supported. System.Security.AccessControl.DirectorySecurity..ctor ()

Is this a Mono problem, or something to do with Unity?

I can't use PlayerPrefs because that is stored in the current user registry, so it doesn't support multi-user environments (i.e. data shared between them).

Or does anyone have any suggestions for alternative ways of handling shared data like this?

Thanks!