My server is still windows based, which I know is a bit of a sin at this point, but just bear with me please
There seem to be a few options avaliable, but I can’t figure out if they all both support windows and C#, and a lot of the information I’m finding is linux specific.
Why? Well, I like to make little roguelikes and card battlers on my phone in pure c# code, it’s a fun way to pass the time that isn’t doom scrolling. A lot of my free time at work is spent sitting on a boat just waiting with no access to my PC
I’ve been using a C# ide on my phone, but Android as become such a fucking nightmare, most stuff seems locked down for some reason, and I can’t access the local files to sync with syncthing to move it my PC when I do want to work with my PC.
So I’d like to use a browser based solution that will just store everything locally on my server
An alternative (which doesnt fully meet your requirements for browser based) is Jetbrains Rider. You can use its remote development feature to have your code on your server, and the IDE on your local computer.
https://www.jetbrains.com/help/rider/Remote_development_overview.html
Another option to get code to and from your device would be to use git to commit and push your code. There are git apps for android that should work for this?