Difference in AspNetCore identity 2.0 and 2.1

Question

• What is the difference in AddIdentity and AddDefaultIdentity

ConfigureServices Method in Startup from AspNetCore identity 2.0

 public void ConfigureServices(IServiceCollection services)
    {
        services.AddDbContext<ApplicationDbContext>(options =>
            options.UseSqlServer(Configuration.GetConnectionString("DefaultConnection")));

        services.AddIdentity<ApplicationUser, IdentityRole>()
            .AddEntityFrameworkStores<ApplicationDbContext>()
            .AddDefaultTokenProviders();

        // Add application services.
        services.AddTransient<IEmailSender, EmailSender>();

        services.AddMvc();
    }

ConfigureServices Method in Startup from AspNetCore identity 2.1

 public void ConfigureServices(IServiceCollection services)
    {
        services.Configure<CookiePolicyOptions>(options =>
        {
            // This lambda determines whether user consent for non-essential cookies is needed for a given request.
            options.CheckConsentNeeded = context => true;
            options.MinimumSameSitePolicy = SameSiteMode.None;
        });

        services.AddDbContext<ApplicationDbContext>(options =>
            options.UseSqlServer(
                Configuration.GetConnectionString("DefaultConnection")));
        services.AddDefaultIdentity<IdentityUser>()
            .AddEntityFrameworkStores<ApplicationDbContext>();

        services.AddMvc().SetCompatibilityVersion(CompatibilityVersion.Version_2_1);
    }

Answer 1

AddDefaultIdentity was introduced in ASP.NET Core 2.1. Calling AddDefaultIdentity is similar to calling the following:

1. AddIdentity

2. AddDefaultUI

3. AddDefaultTokenProviders

Refer to https://github.com/aspnet/Docs/issues/8434