Program.cs

# define CRD // FIRST AC CR CRD
#if NEVER
#elif FIRST
#region snippet1
using Microsoft.EntityFrameworkCore;
using RazorPagesContacts.Data;
var builder = WebApplication.CreateBuilder(args);

builder.Services.AddRazorPages();

builder.Services.AddDbContext<CustomerDbContext>(options =>
    options.UseInMemoryDatabase("name"));

var app = builder.Build();

if (!app.Environment.IsDevelopment())
{
    app.UseExceptionHandler("/Error");
    app.UseHsts();
}

app.UseHttpsRedirection();
app.UseStaticFiles();

app.UseRouting();

app.UseAuthorization();

app.MapRazorPages();

app.Run();
#endregion
#elif AC
#region snippet_ac
using Microsoft.EntityFrameworkCore;
using RazorPagesContacts.Data;
var builder = WebApplication.CreateBuilder(args);

builder.Services.AddRazorPages(options =>
{
    options.RootDirectory = "/MyPages";
    options.Conventions.AuthorizeFolder("/MyPages/Admin");
});

builder.Services.AddDbContext<CustomerDbContext>(options =>
    options.UseInMemoryDatabase("name"));

var app = builder.Build();

if (!app.Environment.IsDevelopment())
{
    app.UseExceptionHandler("/Error");
    app.UseHsts();
}

app.UseHttpsRedirection();
app.UseStaticFiles();

app.UseRouting();

app.UseAuthorization();

app.MapRazorPages();

app.Run();
#endregion
#elif CR
#region snippet_cr
using Microsoft.EntityFrameworkCore;
using RazorPagesContacts.Data;
var builder = WebApplication.CreateBuilder(args);

builder.Services.AddRazorPages(options =>
{
    options.Conventions.AuthorizeFolder("/MyPages/Admin");
})
  .WithRazorPagesAtContentRoot();

builder.Services.AddDbContext<CustomerDbContext>(options =>
    options.UseInMemoryDatabase("name"));

var app = builder.Build();

if (!app.Environment.IsDevelopment())
{
    app.UseExceptionHandler("/Error");
    app.UseHsts();
}

app.UseHttpsRedirection();
app.UseStaticFiles();

app.UseRouting();

app.UseAuthorization();

app.MapRazorPages();

app.Run();
#endregion
#elif CRD
#region snippet_crd
using Microsoft.EntityFrameworkCore;
using RazorPagesContacts.Data;
var builder = WebApplication.CreateBuilder(args);

builder.Services.AddRazorPages(options =>
{
    options.Conventions.AuthorizeFolder("/MyPages/Admin");
})
  .WithRazorPagesRoot("/path/to/razor/pages");

builder.Services.AddDbContext<CustomerDbContext>(options =>
    options.UseInMemoryDatabase("name"));

var app = builder.Build();

if (!app.Environment.IsDevelopment())
{
    app.UseExceptionHandler("/Error");
    app.UseHsts();
}

app.UseHttpsRedirection();
app.UseStaticFiles();

app.UseRouting();

app.UseAuthorization();

app.MapRazorPages();

app.Run();
#endregion
#endif