CONTROLLER

using Kolokwium.Models;
using Microsoft.AspNetCore.Mvc;
using Microsoft.EntityFrameworkCore;
using System.Threading.Tasks;
public class StudentController:Controller
{
    private readonly MyDbContext _context;
    public StudentController(MyDbContext context)
    {
        _context = context;
    }

    public async Task<IActionResult> Index()
    {
        var dane = await _context.Studenci.ToListAsync();
        return View(dane);
    }

    public IActionResult Add()
    {
        return View();
    }
    public IActionResult DodajStudenta(Student student)
    {
        _context.Studenci.Add(student);
        _context.SaveChanges();
        return Redirect("Index");
    }
}
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INDEX

@using Kolokwium.Models;
@model ICollection<Student>

<a asp-action="Add" asp-controller="Student">Dodaj nowego studenta</a>

@foreach(Student student in Model)
{
    <p>@student.Name</p>
    <p>@student.LastName</p>
    <p>@student.NrInex</p>
}
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PROGRAM

using Microsoft.EntityFrameworkCore;
using Kolokwium.Models;

var builder = WebApplication.CreateBuilder(args);

// Add services to the container.
builder.Services.AddControllersWithViews();

________________
var ConnectionString = builder.Configuration.GetConnectionString("DefaultConnection");
builder.Services.AddDbContext<MyDbContext>(options => options.UseSqlServer(ConnectionString));
________________

var app = builder.Build();

// Configure the HTTP request pipeline.
if (!app.Environment.IsDevelopment())
{
    app.UseExceptionHandler("/Home/Error");
    // The default HSTS value is 30 days. You may want to change this for production scenarios, see https://aka.ms/aspnetcore-hsts.
    //app.UseHsts();
}

//app.UseHttpsRedirection();
app.UseStaticFiles();

app.UseRouting();

app.UseAuthorization();

app.MapControllerRoute(
    name: "default",
    pattern: "{controller=Home}/{action=Index}/{id?}");

app.Run();

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MYDBCONTEXT

using Microsoft.EntityFrameworkCore;

namespace Kolokwium.Models
{
    public class MyDbContext:DbContext
    {
        public MyDbContext(DbContextOptions<MyDbContext> options):base(options)
        {
        }

        public DbSet<Student> Studenci {get; set;}
    }
}

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ADD

@using Kolokwium.Models;
@model Student;

<form asp-action="DodajStudenta">
    <label>Imię:<input type="text" asp-for="Name"></input></label>
    <label>Nazwisko:<input type="text" asp-for="LastName"></input></label>
    <label>Numer indeksu:<input type="number" asp-for="NrInex"></input></label>
    <input type="submit" value="Dodaj Studenta">
</form>
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dotnet add package Microsoft.EntityFrameworkCore.SqlServer
dotnet add package Microsoft.EntityFrameworkCore.Sqlite
dotnet add package Microsoft.EntityFrameworkCore
dotnet add package Microsoft.EntityFrameworkCore.Design
dotnet add package Microsoft.EntityFrameworkCore.Tools
dotnet tool install --global dotnet-ef
dotnet ef database update