Hi everyone,

I posted this in the "Graphics Programming" forum...

I wrote a C# application (VS2005) that takes a bunch of images and resize them. Now that I have a quad core, I rewrote it to use threads. Each thread load an image and resize it. After many attempts, I can't get the CPU to work over 25%-29% and that means that only 1 core is used. It seems the bottleneck is the DrawImage() method. It looks like this method only handle 1 thread at a time. Is it possible that DrawImage() uses a lock?

Thx in advance for any hints!