Program.cs

using Microsoft.FeatureManagement;
using Microsoft.Extensions.Configuration.AzureAppConfiguration;

var builder = WebApplication.CreateBuilder(args);


var connection = builder.Configuration.GetConnectionString("AppConfig");
builder.Configuration.AddAzureAppConfiguration(options =>
        options.Connect(connection).UseFeatureFlags()
                    .Select(KeyFilter.Any, LabelFilter.Null)
                    // Override with any configuration values specific to current hosting env
                    .Select(KeyFilter.Any, builder.Environment.EnvironmentName));

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

var app = builder.Build();

// Configure the HTTP request pipeline.
if (!app.Environment.IsDevelopment())
{
    app.UseExceptionHandler("/Home/Error");
}
app.UseStaticFiles();

app.UseRouting();

app.UseAuthorization();

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

app.Run();