C# by capturing a screenshot of the screen and then sending it to the printer using the PrintDocument class. Here's an example code snippet that demonstrates this: 

use the Graphics class to capture a screenshot of the screen. We then create a new instance of the PrintDocument class, set its properties as desired, and attach an event handler to its PrintPage event. In the event handler, we use the Graphics object passed to the event handler to draw the screenshot on the printer page. Finally, we call the Print() method of the PrintDocument object to send the page to the printer.