New Post: How can I set memory option defaultly?

I think you should switch to the x64 version of Magick.NET if you want to allocate that much memory. If you use the Q16 build you need 4GB memory, but under windows in a 32bit process you can only allocate 2GB.

Also don't forget to build with the new source or use the new binary when I have published a new release. The current build contains a memory leak.