ASP.NET MVC with AJAX Dropdown, C#, Java, Html But Without Jquery

I would like to ask a help. A little bit I am lost. It is not an SQL database. The Chegg.Infrastructure folder contains the StaffRepository.cs file

StaffRepository.cs contains these:

namespace Chegg.Infrastructure; public interface IStaffRepository { Staff Get(int id); } public class StaffRepository : IStaffRepository { public Staff Get(int id) { return AllStaff().First(x => x.Id == id); } private IEnumerable AllStaff() { return new Staff[] { new Staff() { Id = 101, FullName = "Bon Jovi", Email = "bonjovi@singer.com", JobTitle = "Singer", Likes = new [] {"Sing", "Play"} }, new Staff() { Id = 182, FullName = "Ed Sheeran", Email = "edsheeran@singer.com", JobTitle = "Great Singer" }, new Staff() { Id = 100, FullName = "Adele", Email = "adele@singer.com", Likes = new [] {"sing","cakes"} }, }; } } public class Staff { public int Id { get; set; } public string FullName { get; set; } public string Email { get; set; } public string JobTitle { get; set; } public string[] Likes { get; set; }

My file system is like this (sadly I could not upload here a photo so):

Main folder:

Chegg.Infrastructure folder

Chegg.UI folder

Chegg.sln Visual Studio Solution

etc.

In the Chegg.Infrastructure folder we can see:

bin folder

obj folder

Chegg.Infrastructure C# Project Source File

StaffRepository.cs C# Source File

etc.

In the Chegg.UI folder we can see the followings:

bin folder

Controllers folder

Models folder

obj folder

Properties folder

Views folder

www.root folder

etc.

I am struggling with this task because my singer data is in a different folder and that I must have to do it without JQuery.

TASK

1. I need a dropdown list on the Home page (index.cshtml) where I can choose from the singers staff.
2. And if an option has been selected I need a visible table with columns under the dropdown select list where I can see the data by Ajax (Id, FullName, JobTitle, Likes etc. of the selected person) without JQuary.

@{ ViewData["Title"] = "Home Page"; }

Staff List

Select to load Select one