Create a folder with permissions set to This Folder, subfolders

Question

Basically my app creates 4 folders that gives a specific user certain permissions.
I can create the folder find, and i can give the user the correct permissions, but by defaulse it has Apply To set to this folder only, so if the user creates a folder, they wont have permissions to access it.
I want to give it permissions that Apply to: This folder, subfolders, and files.
I have spent hours upon hours trying different things, and trying to find the answer anywhere. Any help is greatly appreciated.
Here is my code to create the folders:
string mailDataPath = "E:\\Data\\MailData\\" + logonName;
string userDataPath = "E:\\Data\\UserData\\" + logonName;
string userProfilePath = "E:\\Data\\UserProfile\\" + logonName;
string userSharedPath = "E:\\Data\\UserShared\\" + logonName;
path[0] = mailDataPath;
path[1] = userDataPath;
path[2] = userProfilePath;
path[3] = userSharedPath;
//If folders do not exists, create them.
for (int x = 0; x < pathAmount; x++)
if (!Directory.Exists(path[x]))
Directory.CreateDirectory(path[x]);
//Sets folder permissions dependant on which folder it is
if (path[x] != userProfilePath)
DirectoryInfo info = new DirectoryInfo(path[x]);
DirectorySecurity security = info.GetAccessControl();
security.AddAccessRule(new FileSystemAccessRule(logonName, FileSystemRights.Modify, AccessControlType.Allow));
info.SetAccessControl(security);
else if (path[x] == userProfilePath)
DirectoryInfo info = new DirectoryInfo(path[x]);
DirectorySecurity security = info.GetAccessControl();
security.AddAccessRule(new FileSystemAccessRule(logonName, FileSystemRights.FullControl, AccessControlType.Allow));
info.SetAccessControl(security);

Answer 1

Figured it out. It wasn't as difficult as i made it out to be.
I just need to use 2 access rules
DirectoryInfo info =
new
DirectoryInfo(path[x]);
DirectorySecurity security = info.GetAccessControl();
security.AddAccessRule(new
FileSystemAccessRule(logonName,
FileSystemRights.Modify,
InheritanceFlags.ContainerInherit,
PropagationFlags.None,
AccessControlType.Allow));
security.AddAccessRule(new
FileSystemAccessRule(logonName,
FileSystemRights.Modify,
InheritanceFlags.ObjectInherit,
PropagationFlags.None,
AccessControlType.Allow));
info.SetAccessControl(security);
this is the code for the setting of the permissions.
had to play around with it a bunch to get the correct inheritance.
Im sorry i dont realy understand. Where do i put this code? Is there a guide for were to put this? Thanks for your help! :)