get shellicon pump my memory to crash

hey,

yesterday i asked about filling a datagrid. It chrashed after filling it too often with a class. But after testing i was able to identify the source of the Memory leak. To get the Icon for the proper file i use following methods:

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

        class Win32
        {
            public const uint SHGFI_ICON = 0x100;
            public const uint SHGFI_LARGEICON = 0x0;    // 'Large icon
            public const uint SHGFI_SMALLICON = 0x1;    // 'Small icon
            [DllImport("shell32.dll")]
            public static extern IntPtr SHGetFileInfo(string pszPath, uint dwFileAttributes, ref SHFILEINFO psfi,
                                                      uint cbSizeFileInfo, uint uFlags);
        }

        IntPtr hImgSmall;    //the handle to the system image list
        IntPtr hImgLarge;    //the handle to the system image list
        SHFILEINFO shinfo = new SHFILEINFO();
        System.Drawing.Icon ico;
        public System.Windows.Media.ImageSource GetIcon(string path, bool IsFolder, bool GetSmall)
        {
            try
            {
                
                if (GetSmall)
                    hImgSmall = Win32.SHGetFileInfo(path, 0, ref shinfo, (uint)Marshal.SizeOf(shinfo), Win32.SHGFI_ICON | Win32.SHGFI_SMALLICON);
                else
                    hImgLarge = Win32.SHGetFileInfo(path, 0, ref shinfo, (uint)Marshal.SizeOf(shinfo), Win32.SHGFI_ICON | Win32.SHGFI_LARGEICON);

                ico = System.Drawing.Icon.FromHandle(shinfo.hIcon);
                return System.Windows.Interop.Imaging.CreateBitmapSourceFromHIcon(ico.Handle, System.Windows.Int32Rect.Empty, System.Windows.Media.Imaging.BitmapSizeOptions.FromEmptyOptions());
                
            }
            catch
            {
               
                if (IsFolder)
                    return new System.Windows.Media.Imaging.BitmapImage(new Uri("pack://application:,,,/Resources\\foldericon.jpg", UriKind.RelativeOrAbsolute));
                else
                    return new System.Windows.Media.Imaging.BitmapImage(new Uri("pack://application:,,,/Resources\\filedefaulticon.png", UriKind.RelativeOrAbsolute));
            }
        }

The Last and main Method (GetIcon()), is the problem,

the line:    ico = System.Drawing.Icon.FromHandle(shinfo.hIcon); pumps the Memory!!!!!

So i tried something and tried following to tet the application:

   if (GetSmall)
                    hImgSmall = Win32.SHGetFileInfo(path, 0, ref shinfo, (uint)Marshal.SizeOf(shinfo), Win32.SHGFI_ICON | Win32.SHGFI_SMALLICON);
                else
                    hImgLarge = Win32.SHGetFileInfo(path, 0, ref shinfo, (uint)Marshal.SizeOf(shinfo), Win32.SHGFI_ICON | Win32.SHGFI_LARGEICON);

               ico = System.Drawing.Icon.FromHandle(shinfo.hIcon);
               ico.Dispose();
               
              //  return System.Windows.Interop.Imaging.CreateBitmapSourceFromHIcon(ico.Handle, System.Windows.Int32Rect.Empty, System.Windows.Media.Imaging.BitmapSizeOptions.FromEmptyOptions());
                return null;

only if supress the creation of the ico, the application runs fine.

Has anyone experiences with thisproblem??