mono/SkiaSharp ? reverse-engineered prompt

Build me a cross platform 2D graphics library for .NET that lets people draw images, shapes, text, and bitmaps in apps on Windows, macOS, iOS, Android, Linux, web, and desktop.

I want it to feel like a clean .NET package people can install and use right away, with good support for rendering on mobile, server, and desktop. Include simple sample apps that show how to draw on screen and save an image to a file. Make sure there’s a solid public API, helpful docs, and a basic test setup so the core pieces are easy to verify.

If there are native dependencies or platform specific steps, set things up so the project still builds as smoothly as possible, and point me to anything I need to install. Use current docs online if you need to.