File.ExtractIconFromExecutable Method

public static Icon ExtractIconFromExecutable(string path)
 {
     IntPtr module = IntPtr.Zero;
     try
     {
         module = Import.LoadLibraryEx(path, IntPtr.Zero, 2);
         if (module == IntPtr.Zero) throw new Win32Exception();
         Icon result = null;
         Import.EnumResourceNames(module, (IntPtr)14, (mod, type, name, lParam) =>
         {
             byte[] groupIcon = Import.GetDataFromResource(module, (IntPtr)14, name);
             int count = BitConverter.ToUInt16(groupIcon, 4);
             int size = 6 + count * 16 + Enumerable.Range(0, count).Select(i => BitConverter.ToInt32(groupIcon, 6 + i * 14 + 8)).Sum();
             using (MemoryStream memoryStream = new MemoryStream(size))
             {
                 using (BinaryWriter writer = new BinaryWriter(memoryStream))
                 {
                     writer.Write(groupIcon, 0, 6);
                     for (int i = 0, offset = 6 + count * 16; i < count; ++i)
                     {
                         byte[] icon = Import.GetDataFromResource(module,
                             (IntPtr)3,
                             (IntPtr)BitConverter.ToUInt16(groupIcon, 6 + i * 14 + 12));
                         writer.Seek(6 + i * 16, SeekOrigin.Begin);
                         writer.Write(groupIcon, 6 + i * 14, 8);
                         writer.Write(icon.Length);
                         writer.Write(offset);
                         writer.Seek(offset, SeekOrigin.Begin);
                         writer.Write(icon, 0, icon.Length);
                         offset += icon.Length;
                     }
                 }
                 using (MemoryStream iconStream = new MemoryStream(memoryStream.ToArray()))
                     result = new Icon(iconStream);
             }
             return false;
         }, IntPtr.Zero);
         return result;
     }
     catch
     {
         return null;
     }
     finally
     {
         if (module != IntPtr.Zero)
             Import.FreeLibrary(module);
     }
 }