End Google Ads 201810 - BS.net 01 --> I code the C# program

I would like to know how to improve the time that my code generates the thumbnails
(I use getThumbnail module)
Image size is about 3 - 4 K. Now, It spends 1 sec. per image.
The commercial app. like ACDSee spends less than 1 sec.



Any methods or modules for C# that speed up the thumbnail generation please advice.


Or that's just C# GDI's module limitation.




Thank you.