EmbedIO
A tiny, cross-platform, module based web server for .NET
... modules -- For example, video streaming, UPnP, etc. Check out EmbedIO Extras for additional modules. Small memory footprint. Create REST APIs quickly with the out-of-the-box Web API module. Serve static or embedded files with 1 line of code (also out-of-the-box). Handle sessions with the built-in LocalSessionWebModule. WebSockets support CORS support. Origin, Header and Method validation with OPTIONS preflight. HTTP 206 Partial Content support. Support Xamarin Forms.