.net - What image format is easy to turn into on or off pixels? -

I have a hobby project in which I run LCD through my serial port.

I want to display an image with 128x128 pixels, but I'm not sure which format to use. I am limited to "off" or "on" as the status of each pixel, what format do you suggest?

If it matters, then I am planning to use a .NET framework with this

I recommend using a bitmap

.GetPixel and .SETPixel methods both use the system.Drawing.Color value, so in working together It is quite easy.