Why angular used in asp.net c# mvc

Hi,

This is a broad question, and its really depends on requirement or a project you'd like to develop.

There could be many reasons to use both in a one solution, as per my point view you should use both to take combine advantages of ASP.NET and an Angular.

ASP.NET providing server side features, such as Component, Templates, Data binding, and Routing. Same thing can use client side with an Angular.

However, both can be combined for a SPA(single page application ) or a monolithic project as per needs.