How can I migrate ConfigureServices(IServiceCollection services) from .Net 5 to .Net 6?

I’m trying to enable authentication to my own web api using Azure Active Directory B2C, and following the steps that the official documentations gives us I nees to use this code in my startup.cs, but it is for .Net 5 and I really don’t know how to migrate it to .Net 6. Can you help me?

public void ConfigureServices(IServiceCollection services)
{
    // Adds Microsoft Identity platform (Azure AD B2C) support to protect this Api
    services.AddAuthentication(JwtBearerDefaults.AuthenticationScheme)
            .AddMicrosoftIdentityWebApi(options =>
    {
        Configuration.Bind("AzureAdB2C", options);

        options.TokenValidationParameters.NameClaimType = "name";
    },
    options => { Configuration.Bind("AzureAdB2C", options); });
    // End of the Microsoft Identity platform block    

    services.AddControllers();
}

My Program.cs:

    var builder = WebApplication.CreateBuilder(args);

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

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.UseAuthentication();
app.UseAuthorization();

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

app.Run();

>Solution :

The difference you are seeing is due to the "top-level statements" feature, and not necessarily to .NET5 vs .NET6.

To add the needed code, you can rely on your builder object, which provides you access to the services and configuration.

var builder = WebApplication.CreateBuilder(args);

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

// Adds Microsoft Identity platform (Azure AD B2C) support to protect this Api
builder.Services.AddAuthentication(JwtBearerDefaults.AuthenticationScheme)
    .AddMicrosoftIdentityWebApi(options =>
    {
        builder.Configuration.Bind("AzureAdB2C", options);

        options.TokenValidationParameters.NameClaimType = "name";
    },
    options => { Configuration.Bind("AzureAdB2C", options); });
    // End of the Microsoft Identity platform block

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.UseAuthentication();
app.UseAuthorization();

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

app.Run();