Program.cs

using GameZone.Services;
using GameZone.Data;
using Microsoft.AspNetCore.Identity;
using Microsoft.EntityFrameworkCore;
using GameZone.ViewModel;
using Microsoft.AspNetCore.Identity.UI.Services;

var builder = WebApplication.CreateBuilder(args);

// Add services to the container.
builder.Services.AddControllersWithViews();
var connectionString = builder.Configuration.GetConnectionString(name: "MyCon")
    ?? throw new InvalidOperationException(message: "no connection string was found !");
builder.Services.AddDbContext<AppDbContext>(options => options.UseSqlServer(connectionString));

builder.Services.AddDefaultIdentity<IdentityUser>(options => options.SignIn.RequireConfirmedAccount = true)
    .AddRoles<IdentityRole>()
    .AddEntityFrameworkStores<AppDbContext>();
builder.Services.AddTransient<IEmailSender,EmailSender>();
builder.Services.AddScoped<ICategoriesService,CategoriesService>();
builder.Services.AddScoped<IDevicesService, DevicesService>();
builder.Services.AddScoped<IGamesService, GamesService>();
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.UseEndpoints(endpoints => endpoints.MapRazorPages());
app.Run();