C# Windows application

I am looking for a windows service proof of concept that can get in the middle of files being written in windows. Basically exactly like an Antivirus works in terms of being able to scan a file before It allows it to write to windows I need to be able to intercept files and cache them before they are written by windows (the last 10 files written I need to cache). I am building some general protection tools but need the ability to be able to cache files before they write with the following conditions: -Ideally this will be all files in the windows file system including system files (but happy to accept if we have to nominate target folders to watch). -I don’t really want any SQL Lite or SQL Server involved no way of creating a meta base of files. Just needs to cache the last 6 files windows writes before it overwrites / saves etc This doesn’t need to be fancy just a proof of concept to prove that we can do this is all that is needed at the moment.