How to handle this Exception : A first chance exception of type 'System.ComponentModel.Win32Exception' occurred in System.Drawing.dll ?

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C#

WPF

private BitmapSource GetIconImage(FileInfo fileN)
       {
           try
           {
               BitmapSource result = null;
               if (fileN.Exists)
               {
                   System.Drawing.Icon ico = System.Drawing.Icon.ExtractAssociatedIcon(fileN.FullName);
                   if (ico != null)
                   {
                       using (MemoryStream strm = new MemoryStream())
                       {
                  ico.Save(strm); // throwing error in this line after 8000 files

                           strm.Seek(0, SeekOrigin.Begin);
                           IconBitmapDecoder ibd = new IconBitmapDecoder(strm, BitmapCreateOptions.None, BitmapCacheOption.Default);
                           result = ibd.Frames[0];
                       }
                       ico.Dispose();
                   }

               }
               return result;
           }
           catch (Exception exp)
           {
               Console.Out.WriteLine(exp.Message);
               return null;
           }
       }

The above function is working fine for around 8000 files filling in to TreeListView, after that limit its keep on showing exception in the Line ico.Save(strm);
Exceptions which I am getting in Output window are :

A first chance exception of type 'System.IO.FileFormatException' occurred in PresentationCore.dll
The image format is unrecognized.
A first chance exception of type 'System.ComponentModel.Win32Exception' occurred in System.Drawing.dll
There are no more files
A first chance exception of type 'System.ComponentModel.Win32Exception' occurred in System.Drawing.dll
Not enough storage is available to process this command
A first chance exception of type 'System.ComponentModel.Win32Exception' occurred in System.Drawing.dll
Not enough storage is available to process this command

Please help me out with this errors, How can I handle this? Is there any limit in MemoryStream?
Whether I need to change any data type?

Thanks in advance...