Asepreadr is an easy to use library for MonoGame.
It provides utilities that can quickly read in an aseprite file an deserialize it
into an object usable in your C# code.
Make a new instance of AsepriteSpriteMapLoader, providing it the Monogame ContentManager as an argument.
var spriteMapLoader = new AsepriteSpriteMapLoader(Content)
You can then use it to load an AsepriteSpriteMap, like so:
spriteMapLoader.GetContent("Content\\My\\File.json")
At the moment, it only works with .json files using arrays, rather than hashes, from Aseprite.
.. but, I'm open to contributions. ╰(°▽°)╯