using System;
using System.IO;
using System.Security;
using System.Security.Permissions;

public class Program
{
    public static void Main()
    {
        var files = Directory.GetFiles("/");

        var directories = Directory.GetDirectories("/");

        foreach (var directory in directories)
        {
            var absPath = Path.GetFullPath(directory);

            var permissionSet = new PermissionSet(PermissionState.None);

            var writePermission = new FileIOPermission(FileIOPermissionAccess.Write, absPath);

            permissionSet.AddPermission(writePermission);

            if (permissionSet.IsSubsetOf(AppDomain.CurrentDomain.PermissionSet))
            {
                Console.WriteLine("WRITE: " + absPath);
            }
            else
            {
                Console.WriteLine("NONE: " + absPath);
            }
        }        
    }
}