DirectoryDeleter

using System;
using System.IO;
using System.Collections.Generic;

class DirectoryDeleter{
    public static void DeleteSubdirsOlderThan(DirectoryInfo di, TimeSpan ts){
        if(!di.Exists) return;
        Stack<DirectoryInfo> dirs = new Stack<DirectoryInfo>();
        dirs.Push(di);
        DirectoryInfo current;
        while(dirs.Count > 0){
            current = dirs.Pop();
            try{
                foreach(DirectoryInfo subdir in current.GetDirectories()){
                    if((DateTime.Now - subdir.CreationTime) > ts){
                        try{
                            subdir.Delete(true);
                        }
                        catch(UnauthorizedAccessException){
                            Console.Error.WriteLine("Access denied: \"{0}\"", subdir.FullName);
                        }
                        catch(DirectoryNotFoundException){
                            Console.Error.WriteLine("Directory not found: \"{0}\"", subdir.FullName);
                        }
                        catch(IOException){
                            Console.Error.WriteLine("Directory is read-oly: \"{0}\"", subdir.FullName);
                        }
                    }
                    else{
                        dirs.Push(subdir);
                    }
                }
            }
            catch(UnauthorizedAccessException){}
        }
    }
}