This code snippet will connect to a Box account and loop through all the folders recursively, printing out all the filenames, while highlighting in red files that have a modified_at date older than the specified threshold. In other words, it highlights files that haven't been changed in a while.

Iterate Box folders in C#

//requires .NET 4.5

using Box.V2;
using Box.V2.Auth;
using Box.V2.Config;
using Box.V2.Exceptions;
using Box.V2.Models;
using Nito.AsyncEx;
using System;
using System.Collections.Concurrent;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApplication1
{
    class Program
    {
        const string CLIENT_ID = "YOUR_CLIENT_ID";
        const string CLIENT_SECRET = "YOUR_CLIENT_SECRET";
        const string DEV_ACCESS_TOKEN = "YOUR_DEV_ACCESS_TOKEN";
        const string REFRESH_TOKEN = "THIS_CAN_ANY_RANDOM_STRING";

        static readonly DateTime MODIFIED_AT_CUTOFF = new DateTime(2013, 7, 1);

        static BoxClient client;

        static void Main(string[] args)
        {
            //http://blog.stephencleary.com/2012/02/async-console-programs.html
            try
            {
                var config = new BoxConfig(CLIENT_ID, CLIENT_SECRET, new Uri("http://localhost"));
                var session = new OAuthSession(DEV_ACCESS_TOKEN, REFRESH_TOKEN, 3600, "bearer");
                client = new BoxClient(config, session);

                AsyncContext.Run(() => MainAsync());
            }
            catch (Exception ex)
            {
                Console.Error.WriteLine(ex);
            }

            Console.WriteLine();
            Console.Write("Press return to exit...");
            Console.ReadLine();
        }

        static async Task MainAsync()
        {
            BoxFolder root = await client.FoldersManager.GetInformationAsync("0");
            await LoadFolder(root);
        }

        static async Task LoadFolder(BoxFolder folder)
        {
            try
            {
                var fullPath = folder.PathCollection.Entries.Aggregate("/", (prefix, f) => prefix + f.Name + "/");
                Console.WriteLine(fullPath + folder.Name);

                var items = await client.FoldersManager.GetFolderItemsAsync(folder.Id, 100, 0, new List<string>() { BoxFolder.FieldName, BoxFolder.FieldPathCollection, BoxFolder.FieldModifiedAt });
                var folders = items.Entries.OfType<BoxFolder>().ToList();
                var files = items.Entries.OfType<BoxFile>().ToList();
                files.ForEach((f) => 
                    {
                        var currColor = Console.ForegroundColor;
                        if (f.ModifiedAt.HasValue && f.ModifiedAt.Value < MODIFIED_AT_CUTOFF)
                        {
                            Console.ForegroundColor = ConsoleColor.Red;
                        }
                        Console.WriteLine("--> {0}",f.Name);
                        Console.ForegroundColor = currColor;
                    });
                Console.WriteLine();

                await folders.ForEachAsync(1,(f) => LoadFolder(f));
            }
            catch (BoxException bex)
            {
                var currColor = Console.ForegroundColor;
                Console.ForegroundColor = ConsoleColor.Yellow;
                Console.Error.WriteLine(bex.StatusCode);
                Console.ForegroundColor = currColor;
            }
        }
    }

    public static class Extensions
    {
        //http://blogs.msdn.com/b/pfxteam/archive/2012/03/05/10278165.aspx

        public static Task ForEachAsync<T>(this IEnumerable<T> source, int degreeOfParallelism, Func<T, Task> body)
        {
            return Task.WhenAll(
                from partition in Partitioner.Create(source).GetPartitions(degreeOfParallelism)
                select Task.Run(async delegate
                {
                    using (partition)
                        while (partition.MoveNext())
                            await body(partition.Current);
                }));
        }
    }
}

Hi Chad,

I keep getting the error: "Could not load file or assembly 'Nito.AsyncEx.Enlightenment, Version=3.0.0.0, Culture=neutral, PublicKeyToken=null' or one of its dependencies. The system cannot find the file specified."

I did a NuGet update but the error is still there. I am a newbie with Box, try to see how the Box app working. Thanks much. An Nguyen