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);
            }
        }        
    }
}

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