Asp.Net MVC C#
Ionic is a complete open-source SDK for hybrid mobile app development. Ionic built on top of Angular. Ionic provides tools and services for developing hybrid mobile apps using Web technologies like CSS, HTML5, SASS. App stores and apps can be built with these Web technologies and then distributed through native to be installed on devices by leveraging Cordova.
.NET is a developer platform made up of tools, programming languages, and libraries for building many different types of applications.
ASP.NET extends the .NET developer platform with tools and libraries specifically for building web apps.