With .NET core providing superior security, reliability and multi-platform deployment options, many legacy ASP.NET monolithic applications are being refactored into separate Frontend and Backend Applications.

Using .NET core offers many advantages over ASP.NET including Entity Framework,Repository Design Pattern, Dependency Injection etc.

A single .NET Web API Application for Backend can help cater to multiple Frontend applications each targeting a different device operating system.

Jason web token Authentication with a .NET Web API Backend provides great flexibility to authenticate users across the platforms.