What is the best way to include text?

Words
Image by Free-Photos from Pixabay

One of the games I’m working on needs to include a 1.9 MB text file (200,000 words). Now it’s not that big a deal but using 7zip I can compress it down to 400 KB and that’s 20% of the uncompressed size. So I’m thinking of including some C# code to decompress it.

But I did wonder if there was any kind of built in decompression, so you could add it to say Resources and have it decompressed automatically when read. I haven’t seen anything like that but it would be cool if if existed.