Problem with zooming on a picture

[javad2000]

Hello

I have a very small black&white picture (4*4 pixels). Here's a magnified view of the picture:


I want to show this picture in a PictureBox whose "SizeMode" property is set to "Stretched". Normally, I expect the image to be larger than the source image and show something like this:


But it shows this:


How can I solve this problem?

Thank u