Elenco site collection con spazio occupato e data ultima modifica

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Microsoft.SharePoint;
using Microsoft.SharePoint.Administration;

namespace ElencoSiteCollection
{
  class Program
  {
    static void Main(string[] args)
    {
      string url = args[0];
      Console.WriteLine("Sito: " + url);
      SPUserToken ut = null;

      using (SPSite site = new SPSite(url))
      {
        ut = site.SystemAccount.UserToken;
      }
      using (SPSite site = new SPSite(url, ut))
      {
        Console.WriteLine("User:" + site.RootWeb.CurrentUser);
        SPWebApplication wApp = site.WebApplication;
        foreach (SPSite s in wApp.Sites)
        {
          s.CatchAccessDeniedException = true;
          //stampo i dati della site collection
          string msg = "Site;" + s.ServerRelativeUrl;
          try
          {
            //trovo la data di ultima modifica del sito
            DateTime dt = DateTime.MinValue;
            if (s.LastContentModifiedDate > dt)
              dt = s.LastContentModifiedDate;
            if (s.LastSecurityModifiedDate > dt)
              dt = s.LastSecurityModifiedDate;

            msg += ";" + dt.ToString("yyyy-MM-dd HH:mm:ss");
            msg += ";" + (s.Usage.Storage / 1048576.0).ToString("0.0");
          }
          catch (Exception ex)
          {
            Console.WriteLine(ex);
          }
          finally
          {
            s.Dispose();
          }
          Console.WriteLine(msg);
        }
      }
    }
  }
}