注意：系统安装了.NET Framework（.Net框架） 2.0(22.4MB)或3.0(50.3MB)及以上版本才能运行本软件。

Paint.NET是一个图像和照片处理软件，它由华盛顿州立大学的学生开发和维护并由微软公司提供项目指导，早期定位于MS Paint的免费替代软件，现在逐渐发展为一个功能强大且易用的的图像和照片处理软件，支持图层，无限制的历史记录，特效，和许多实用工具，并且开放源代码和完全免费，界面看起来有点像Photoshop。该软件的开发语言是C#。


更新信息：
New: Posterize adjustment, by Ed Harvey.
New: Intersect selection editing mode.
Improved: Dramatically improved selection editing performance for the Add and Subtract modes (and also for Intersect). The performance used to be dependent on image size, and thus was often unusable on images larger than 1024x768 pixels. It is now dependent only on selection complexity (number of polygon edges) -- the improvement is generally between 3x and 1000x.
New: When holding Ctrl or Alt for a selection tool, the cursor now has a plus or minus indicator.
Changed: The canvas background is now a solid color instead of a gradient. The gradient was causing certain tone misjudgments related to bright versus dark colors.
Changed: Shortcut key for Sepia is now Ctrl+Shift+E. The shortcut for Posterize is now Ctrl+Shift+P.
Changed: Hotkeys for selection modes are now Left click for Replace, Control+Left click for Add (uni on), Alt+Left click for Subtract (difference), Ctrl+Left click for Intersect, and Ctrl+Right click for Invert (xor).
Changed: When using a selection mode other than "replace", it will now draw the selection outline so that you can see both the original and resulting selection areas. Before, it would only draw the resulting selection area outline, which made modes such as Intersect hard to use.