This is just an archive of my mono stuff collection, used for the old tutorial how to fix black screen for decrypted Assembly-CSharp.dll. This is no longer maintained
https://www.andnixsh.com/2020/04/fix-black-screen-for-decrypted-assembly.html
To get the files by yourself, read this tutorial
https://www.andnixsh.com/2020/04/unity-mono-stuff-for-android.html