Sweet Alert far better than html alert.
This sweet alert basically clarify which actions perform by user.

If you want to use in your ASP.NET MVC project then you are the right place.
I will explain step by step how can you implement swal in your project.

Step 1 : 
include swal SDN in your project  - https://sweetalert.js.org/guides/     https://sweetalert2.github.io/

step 2 :

Use swal in JavaScript.

I will show you after deletion using sweet alert.