Código alterado conforme exercício

ContosoPizza/Pages/Index.cshtml

@@ -1,10 +1,13 @@
 @page
 @model IndexModel
 @{
-    ViewData["Title"] = "Home page";
+    ViewData["Title"] = "The Home for Pizza Lovers";
+    TimeSpan timeInBusiness = DateTime.Now - new DateTime(2018, 8, 14);
 }
 
 <div class="text-center">
-    <h1 class="display-4">Welcome</h1>
-    <p>Learn about <a href="https://docs.microsoft.com/aspnet/core">building Web apps with ASP.NET Core</a>.</p>
+    <h1 class="display-4">Welcome to Contoso Pizza</h1>
+    <p class="lead">
+        The best pizza in town for @Convert.ToInt32(timeInBusiness.TotalDays) days!
+    </p>
 </div>

ContosoPizza/Pages/PizzaList.cshtml

@@ -0,0 +1,99 @@
+@page
+@model CotosoPizza.Pages.PizzaListModel
+@{
+    ViewData["Title"] = "Pizza List 🍕";
+}
+
+<h1>Pizza List 🍕</h1>
+
+<form method="post">
+    <div asp-validation-summary="ModelOnly" class="text-danger"></div>
+    <div class="form-group">
+        <label asp-for="NewPizza.Name" class="control-label"></label>
+        <input asp-for="NewPizza.Name" class="form-control" />
+        <span asp-validation-for="NewPizza.Name" class="text-danger"></span>
+    </div>
+    <div class="form-group">
+        <label asp-for="NewPizza.Size" class="control-label"></label>
+        <select asp-for="NewPizza.Size" class="form-control" id="PizzaSize">
+            <option value="">-- Select Size --</option>
+            <option value="Small">Small</option>
+            <option value="Medium">Medium</option>
+            <option value="Large">Large</option>
+        </select>
+        <span asp-validation-for="NewPizza.Size" class="text-danger"></span>
+    </div>
+    <div class="form-group form-check">
+        <label class="form-check-label">
+            <input class="form-check-input" asp-for="NewPizza.IsGlutenFree" /> @Html.DisplayNameFor(model => model.NewPizza.IsGlutenFree)
+        </label>
+    </div>
+    <div class="form-group">
+        <label asp-for="NewPizza.Price" class="control-label"></label>
+        <input asp-for="NewPizza.Price" class="form-control" />
+        <span asp-validation-for="NewPizza.Price" class="text-danger"></span>
+    </div>
+    <div class="form-group">
+        <input type="submit" value="Create" class="btn btn-primary" />
+    </div>
+</form>
+
+
+
+<table class="table mt-5">
+    <thead>
+        <tr>
+            <th scope="col">Name</th>
+            <th scope="col">Price</th>
+            <th scope="col">Size</th>
+            <th scope="col">Gluten Free</th>
+            <th scope="col">Delete</th>
+        </tr>
+    </thead>
+    <tbody>
+    @foreach (var pizza in Model.PizzaList)
+    {
+        <tr>
+            <td>@pizza.Name</td>
+            <td>@($"{pizza.Price:C}")</td>
+            <td>@pizza.Size</td>
+            <td>@(pizza.IsGlutenFree ? "✔️" : string.Empty)</td>
+            <td>
+                <form method="post" asp-page-handler="Delete" asp-route-id="@pizza.Id">
+                    <button class="btn btn-danger">Delete</button>
+                </form>
+            </td>
+        </tr>
+    }
+    </tbody>
+</table><table class="table mt-5">
+    <thead>
+        <tr>
+            <th scope="col">Name</th>
+            <th scope="col">Price</th>
+            <th scope="col">Size</th>
+            <th scope="col">Gluten Free</th>
+            <th scope="col">Delete</th>
+        </tr>
+    </thead>
+    <tbody>
+    @foreach (var pizza in Model.PizzaList)
+    {
+        <tr>
+            <td>@pizza.Name</td>
+            <td>@($"{pizza.Price:C}")</td>
+            <td>@pizza.Size</td>
+            <td>@(pizza.IsGlutenFree ? "✔️" : string.Empty)</td>
+            <td>
+                <form method="post" asp-page-handler="Delete" asp-route-id="@pizza.Id">
+                    <button class="btn btn-danger">Delete</button>
+                </form>
+            </td>
+        </tr>
+    }
+    </tbody>
+</table>
+
+@section Scripts {
+    <partial name="_ValidationScriptsPartial"/>
+}

ContosoPizza/Pages/PizzaList.cshtml.cs

@@ -0,0 +1,44 @@
+using Microsoft.AspNetCore.Mvc;
+using Microsoft.AspNetCore.Mvc.RazorPages;
+using ContosoPizza.Models;
+using ContosoPizza.Services;
+
+namespace CotosoPizza.Pages
+{
+    public class PizzaListModel : PageModel
+    {
+        private readonly PizzaService _service;
+        public IList<Pizza> PizzaList { get; set; } = default!;
+
+        [BindProperty]
+        public Pizza NewPizza { get; set; } = default!;
+
+        public PizzaListModel(PizzaService service)
+        {
+            _service = service;
+        }
+
+        public void OnGet()
+        {
+            PizzaList = _service.GetPizzas();
+        }
+
+        public IActionResult OnPost()
+        {
+            if (!ModelState.IsValid || NewPizza == null)
+            {
+                return Page();
+            }
+
+            _service.AddPizza(NewPizza);
+            return RedirectToAction("Get");
+        }
+
+        public IActionResult OnPostDelete(int id)
+        {
+            _service.DeletePizza(id);
+
+            return RedirectToAction("Get");
+        }
+    }
+}

ContosoPizza/Pages/Shared/_Layout.cshtml

@@ -22,6 +22,9 @@
                         <li class="nav-item">
                             <a class="nav-link text-dark" asp-area="" asp-page="/Index">Home</a>
                         </li>
+                        <li class="nav-item">
+                            <a class="nav-link text-dark" asp-area="" asp-page="/PizzaList">Pizza List🍕</a>
+                        </li>
                         <li class="nav-item">
                             <a class="nav-link text-dark" asp-area="" asp-page="/Privacy">Privacy</a>
                         </li>

ContosoPizza/Program.cs

@@ -9,6 +9,7 @@
 builder.Services.AddRazorPages();
 builder.Services.AddDbContext<PizzaContext>(options =>
     options.UseSqlite("Data Source=ContosoPizza.db"));
+builder.Services.AddScoped<PizzaService>();
 
 var app = builder.Build();