Believe it or not you can use Microsoft's Visual Studio Code from your web browser, or at least, versions of it.

Install the Pythagora extension in Visual Studio Code to get started. Initialize your project by specifying requirements; Pythagora generates the initial codebase.

Mono for Android consists of the core Mono runtime, bindings for native Android APIs, a Visual Studio 2010 plug-in, and an SDK that contains all the tools needed to build, debug, and deploy apps.