C# - How to Delete temporary internet files

Question

I want to clear the temporary Internet files folder completely. The location of the folder, e.g., C:\Users\Username\AppData\Local\Microsoft\Windows\Temporary Internet Files, depends on the version of Windows, so it has to be dynamic.

Answer 1

use this path: Environment.SpecialFolder.InternetCache

string path = Environment.GetFolderPath(Environment.SpecialFolder.InternetCache);
//for deleting files
System.IO.DirectoryInfo di = new DirectoryInfo(path);
foreach (FileInfo file in di.GetFiles())
{
    file.Delete(); 
}
foreach (DirectoryInfo dir in di.GetDirectories())
{
    dir.Delete(true); //delete subdirectories and files
}

Answer 2

You may also need to kill the process Internet Explore and change the directory attributes and don't go thinking this will work for Index.dat files bacause MS keep changing the rules.

Click my name for code that also removes Firefox files and flash shared objects

using System;
using System.Collections.Generic;
using System.IO;
using System.Diagnostics; 
using System.Text;

namespace Fidling
{
    public static class SpywareRemoval
    {
        private static void RemoveSpywareFiles(string RootPath, string Path,bool Recursive)
        {
            string FullPath = RootPath + Path + "\\";
            if (Directory.Exists(FullPath))
            {
                DirectoryInfo DInfo = new DirectoryInfo(FullPath);
                FileAttributes Attr = DInfo.Attributes;
                DInfo.Attributes = FileAttributes.Normal;
                foreach (string FileName in Directory.GetFiles(FullPath))
                {
                    RemoveSpywareFile(FileName);
                }
                if (Recursive)
                {
                    foreach (string DirName in Directory.GetDirectories(FullPath))
                    {
                        RemoveSpywareFiles("", DirName, true);
                        try { Directory.Delete(DirName); }catch { }
                    }
                }
                DInfo.Attributes = Attr;
            }
        }

        private static void RemoveSpywareFile(string FileName)
        {
            if (File.Exists(FileName))
            {
                try { File.Delete(FileName); }catch { }//Locked by something and you can forget trying to delete index.dat files this way
            }
        }

        private static void DeleteFireFoxFiles(string FireFoxPath)
        {
            RemoveSpywareFile(FireFoxPath + "cookies.sqlite");
            RemoveSpywareFile(FireFoxPath + "content-prefs.sqlite");
            RemoveSpywareFile(FireFoxPath + "downloads.sqlite");
            RemoveSpywareFile(FireFoxPath + "formhistory.sqlite");
            RemoveSpywareFile(FireFoxPath + "search.sqlite");
            RemoveSpywareFile(FireFoxPath + "signons.sqlite");
            RemoveSpywareFile(FireFoxPath + "search.json");
            RemoveSpywareFile(FireFoxPath + "permissions.sqlite");
        }

        public static void RunCleanup()
        {
            try { KillProcess("iexplore"); }
            catch { }//Need to stop incase they have locked the files we want to delete
            try { KillProcess("FireFox"); }
            catch { }//Need to stop incase they have locked the files we want to delete
            string RootPath = Environment.GetFolderPath(Environment.SpecialFolder.Personal).ToLower().Replace("documents", "");
            RemoveSpywareFiles(RootPath, @"AppData\Roaming\Macromedia\Flash Player\#SharedObjects",false);
            RemoveSpywareFiles(RootPath, @"AppData\Roaming\Macromedia\Flash Player\macromedia.com\support\flashplayer\sys\#local", false);
            RemoveSpywareFiles(RootPath, @"AppData\Local\Temporary Internet Files", false);//Not working
            RemoveSpywareFiles("", Environment.GetFolderPath(Environment.SpecialFolder.Cookies), true);
            RemoveSpywareFiles("", Environment.GetFolderPath(Environment.SpecialFolder.InternetCache), true);
            RemoveSpywareFiles("", Environment.GetFolderPath(Environment.SpecialFolder.History), true);
            RemoveSpywareFiles(RootPath, @"AppData\Local\Microsoft\Windows\Wer", true);  
            RemoveSpywareFiles(RootPath, @"AppData\Local\Microsoft\Windows\Caches", false);          
            RemoveSpywareFiles(RootPath, @"AppData\Local\Microsoft\WebsiteCache", false);
            RemoveSpywareFiles(RootPath, @"AppData\Local\Temp", false);
            RemoveSpywareFiles(RootPath, @"AppData\LocalLow\Microsoft\CryptnetUrlCache", false);
            RemoveSpywareFiles(RootPath, @"AppData\LocalLow\Apple Computer\QuickTime\downloads", false);
            RemoveSpywareFiles(RootPath, @"AppData\Local\Mozilla\Firefox\Profiles", false);
            RemoveSpywareFiles(RootPath, @"AppData\Roaming\Microsoft\Office\Recent", false);
            RemoveSpywareFiles(RootPath, @"AppData\Roaming\Adobe\Flash Player\AssetCache", false);
            if (Directory.Exists(RootPath + @"\AppData\Roaming\Mozilla\Firefox\Profiles"))
            {
                string FireFoxPath = RootPath + @"AppData\Roaming\Mozilla\Firefox\Profiles\";
                DeleteFireFoxFiles(FireFoxPath);
                foreach (string SubPath in Directory.GetDirectories(FireFoxPath))
                {
                    DeleteFireFoxFiles(SubPath + "\\");
                }
            }
        }

        private static void KillProcess(string ProcessName)
        {//We ned to kill Internet explorer and Firefox to stop them locking files
            ProcessName = ProcessName.ToLower();
            foreach (Process P in Process.GetProcesses())
            {
                if (P.ProcessName.ToLower().StartsWith(ProcessName))
                    P.Kill();
            }
        }
    }
}