Fix the MIME types in a blob folder

FixMyMimetypes.cs

using System;
using System.Collections.Generic;
using System.Linq;
using Microsoft.WindowsAzure;
using Microsoft.WindowsAzure.StorageClient;

namespace ConsoleApplication1
{
    class Program
    {
        static void recurse(IListBlobItem blobItem, Action<CloudBlockBlob> action)
        {
            if (blobItem is CloudBlobDirectory)
            {
                foreach (var item in ((CloudBlobDirectory)blobItem).ListBlobs())
                {
                    recurse(item, action);
                }
            }
            else
            {
                action((CloudBlockBlob)blobItem);
            }
        }

        static void Main(string[] args)
        {
            var mappings = new Dictionary<string, string>
                               {
                                   { ".html", "text/html" },
                                   { ".css", "text/css" },
                                   { ".jpg", "image/jpeg"},
                                   { ".jpeg", "image/jpeg"},
                                   { ".js", "application/javascript"}
                               };

            Action<CloudBlockBlob> setMimeType = b =>
            {
                var uri = b.Uri.AbsoluteUri;
                var mimeType = mappings.Where(x => uri.EndsWith(x.Key)).Select(x => x.Value).FirstOrDefault();
                if (string.IsNullOrEmpty(mimeType)) return;
                if (string.Equals(b.Attributes.Properties.ContentType, mimeType)) return;
                b.Attributes.Properties.ContentType = mimeType;
                b.SetProperties();
            };


            var accountName = System.Environment.GetEnvironmentVariable("AZURE_STORAGE_ACCOUNT");
            var key = System.Environment.GetEnvironmentVariable("AZURE_STORAGE_ACCESS_KEY");

            var account = new CloudStorageAccount(new StorageCredentialsAccountAndKey(accountName, key),
                                                           useHttps: true);

            var client = account.CreateCloudBlobClient();
            var publicFiles = client.GetContainerReference("public");
            publicFiles.ListBlobs().ToList().ForEach(i => recurse(i, setMimeType));
        }
    }
}