How to permanent login session in asp.net mvc

State management

State can be stored using several approaches. Each approach is described later in this topic.

STATE MANAGEMENT

Storage approach	Storage mechanism
Cookies	HTTP cookies. May include data stored using server-side app code.
Session state	HTTP cookies and server-side app code
TempData	HTTP cookies or session state
Query strings	HTTP query strings
Hidden fields	HTTP form fields
HttpContext.Items	Server-side app code
Cache	Server-side app code

This code will help you for permanent login session

public class Startup

{

    public Startup(IConfiguration configuration)

    {

        Configuration = configuration;

    }

    public IConfiguration Configuration { get; }

    public void ConfigureServices(IServiceCollection services)

    {

        services.AddDistributedMemoryCache();

        services.AddSession(options =>

        {

            options.IdleTimeout = TimeSpan.FromSeconds(10);

            options.Cookie.HttpOnly = true;

            options.Cookie.IsEssential = true;

        });

        services.AddControllersWithViews();

        services.AddRazorPages();

    }

    public void Configure(IApplicationBuilder app, IWebHostEnvironment env)

    {

        if (env.IsDevelopment())

        {

            app.UseDeveloperExceptionPage();

        }

        else

        {

            app.UseExceptionHandler("/Home/Error");

            app.UseHsts();

        }

        app.UseHttpsRedirection();

        app.UseStaticFiles();

        app.UseRouting();

        app.UseAuthentication();

        app.UseAuthorization();

        app.UseSession();

        app.UseEndpoints(endpoints =>

        {

            endpoints.MapDefaultControllerRoute();

            endpoints.MapRazorPages();

        });

    }

}