Get special folders icons (images) using C#

public class SpecialFolderIconSample      
{
 [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)]
        private struct SHFILEINFO
        {
            public IntPtr hIcon;
            public int iIcon;
            public uint dwAttributes;
            [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 260)]
            public string szDisplayName;
            [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 80)]
            public string szTypeName;
        };

        [DllImport("shell32.dll", CharSet = CharSet.Auto)]
        private static extern IntPtr SHGetFileInfo(IntPtr pszPath, uint dwFileAttributes, out SHFILEINFO psfi, uint cbFileInfo, int uFlags);

        [DllImport("user32.dll", SetLastError = true)]
        [return: MarshalAs(UnmanagedType.Bool)]
        private static extern bool DestroyIcon(IntPtr hIcon);

        [DllImport("shell32.dll", SetLastError = true)]
        private static extern int SHGetSpecialFolderLocation(IntPtr hwndOwner, CSIDL nFolder, ref IntPtr ppidl);

        [DllImport("shell32.dll", SetLastError = true)]
        [return: MarshalAs(UnmanagedType.Bool)]
        private static extern bool SHGetPathFromIDListW(IntPtr pidl, [MarshalAs(UnmanagedType.LPTStr)] StringBuilder pszPath);

        private enum CSIDL
        {
            CSIDL_DESKTOP = 0x0000,    // <desktop>
            CSIDL_INTERNET = 0x0001,    // Internet Explorer (icon on desktop)
            CSIDL_PROGRAMS = 0x0002,    // Start Menu\Programs
            CSIDL_CONTROLS = 0x0003,    // My Computer\Control Panel
            CSIDL_PRINTERS = 0x0004,    // My Computer\Printers
            CSIDL_PERSONAL = 0x0005,    // My Documents
            CSIDL_FAVORITES = 0x0006,    // <user name>\Favorites
            CSIDL_STARTUP = 0x0007,    // Start Menu\Programs\Startup
            CSIDL_RECENT = 0x0008,    // <user name>\Recent
            CSIDL_SENDTO = 0x0009,    // <user name>\SendTo
            CSIDL_BITBUCKET = 0x000a,    // <desktop>\Recycle Bin
            CSIDL_STARTMENU = 0x000b,    // <user name>\Start Menu
            CSIDL_MYDOCUMENTS = 0x000c,    // logical "My Documents" desktop icon
            CSIDL_MYMUSIC = 0x000d,    // "My Music" folder
            CSIDL_MYVIDEO = 0x000e,    // "My Videos" folder
            CSIDL_DESKTOPDIRECTORY = 0x0010,    // <user name>\Desktop
            CSIDL_DRIVES = 0x0011,    // My Computer
            CSIDL_NETWORK = 0x0012,    // Network Neighborhood (My Network Places)
            CSIDL_NETHOOD = 0x0013,    // <user name>\nethood
            CSIDL_FONTS = 0x0014,    // windows\fonts
            CSIDL_TEMPLATES = 0x0015,
            CSIDL_COMMON_STARTMENU = 0x0016,    // All Users\Start Menu
            CSIDL_COMMON_PROGRAMS = 0X0017,    // All Users\Start Menu\Programs
            CSIDL_COMMON_STARTUP = 0x0018,    // All Users\Startup
            CSIDL_COMMON_DESKTOPDIRECTORY = 0x0019,    // All Users\Desktop
            CSIDL_APPDATA = 0x001a,    // <user name>\Application Data
            CSIDL_PRINTHOOD = 0x001b,    // <user name>\PrintHood
            CSIDL_LOCAL_APPDATA = 0x001c,    // <user name>\Local Settings\Applicaiton Data (non roaming)
            CSIDL_ALTSTARTUP = 0x001d,    // non localized startup
            CSIDL_COMMON_ALTSTARTUP = 0x001e,    // non localized common startup
            CSIDL_COMMON_FAVORITES = 0x001f,
            CSIDL_INTERNET_CACHE = 0x0020,
            CSIDL_COOKIES = 0x0021,
            CSIDL_HISTORY = 0x0022,
            CSIDL_COMMON_APPDATA = 0x0023,    // All Users\Application Data
            CSIDL_WINDOWS = 0x0024,    // GetWindowsDirectory()
            CSIDL_SYSTEM = 0x0025,    // GetSystemDirectory()
            CSIDL_PROGRAM_FILES = 0x0026,    // C:\Program Files
            CSIDL_MYPICTURES = 0x0027,    // C:\Program Files\My Pictures
            CSIDL_PROFILE = 0x0028,    // USERPROFILE
            CSIDL_SYSTEMX86 = 0x0029,    // x86 system directory on RISC
            CSIDL_PROGRAM_FILESX86 = 0x002a,    // x86 C:\Program Files on RISC
            CSIDL_PROGRAM_FILES_COMMON = 0x002b,    // C:\Program Files\Common
            CSIDL_PROGRAM_FILES_COMMONX86 = 0x002c,    // x86 Program Files\Common on RISC
            CSIDL_COMMON_TEMPLATES = 0x002d,    // All Users\Templates
            CSIDL_COMMON_DOCUMENTS = 0x002e,    // All Users\Documents
            CSIDL_COMMON_ADMINTOOLS = 0x002f,    // All Users\Start Menu\Programs\Administrative Tools
            CSIDL_ADMINTOOLS = 0x0030,    // <user name>\Start Menu\Programs\Administrative Tools
            CSIDL_CONNECTIONS = 0x0031,    // Network and Dial-up Connections
            CSIDL_COMMON_MUSIC = 0x0035,    // All Users\My Music
            CSIDL_COMMON_PICTURES = 0x0036,    // All Users\My Pictures
            CSIDL_COMMON_VIDEO = 0x0037,    // All Users\My Video
            CSIDL_CDBURN_AREA = 0x003b    // USERPROFILE\Local Settings\Application Data\Microsoft\CD Burning
        }

        private BitmapImage GetFolderIcon(CSIDL csidl)
        {
            var shfi = new SHFILEINFO();

            IntPtr ptrDir = IntPtr.Zero;
            SHGetSpecialFolderLocation(IntPtr.Zero, csidl, ref ptrDir);

            var res = SHGetFileInfo(ptrDir, 0, out shfi, (uint)Marshal.SizeOf(shfi), 0x000000100 | 0x000000008);

            Marshal.FreeCoTaskMem(ptrDir);


            var icon = (Icon)System.Drawing.Icon.FromHandle(shfi.hIcon).Clone();

            DestroyIcon(shfi.hIcon);

            Bitmap bmp = icon.ToBitmap();

            using (MemoryStream strm = new MemoryStream())
            {
                bmp.Save(strm, System.Drawing.Imaging.ImageFormat.Png);

                BitmapImage bmpImage = new BitmapImage();

                bmpImage.BeginInit();
                bmpImage.CacheOption = BitmapCacheOption.OnLoad;
                strm.Seek(0, SeekOrigin.Begin);
                bmpImage.StreamSource = strm;
                bmpImage.EndInit();

                bmpImage.Freeze();

                return bmpImage;
            }
        }

        private string GetFolderPath(CSIDL csidl)
        {
            IntPtr ptrDir = IntPtr.Zero;

            try
            {
                const int MAX_PATH = 260;

                SHGetSpecialFolderLocation(IntPtr.Zero, csidl, ref ptrDir);

                StringBuilder sbDirVideo = new StringBuilder(MAX_PATH);

                if (SHGetPathFromIDListW(ptrDir, sbDirVideo))
                {
                    return sbDirVideo.ToString();
                }
            }
            finally
            {
                Marshal.FreeCoTaskMem(ptrDir);
            }

            return null;
        }

public void LoopSpecialFolders()
{
foreach (var specialFolder in Enum.GetNames(typeof(CSIDL)).OrderBy(f => f))

            {
                var f = specialFolder;

                var sfi = new SystemFolderInfo
                    {
                        FolderName = f.Substring(f.IndexOf("_") + 1),
                        Path = GetFolderPath((CSIDL)Enum.Parse(typeof(CSIDL), f)),
                        Icon = GetFolderIcon((CSIDL)Enum.Parse(typeof(CSIDL), f))
                    };
            }

}
}