.NET核心无法添加剃刀页面

<Project Sdk="Microsoft.NET.Sdk.Web">

  <PropertyGroup>
    <TargetFramework>net6.0</TargetFramework>
  </PropertyGroup>

  <ItemGroup>
    <PackageReference Include="Microsoft.AspNetCore.Mvc.RazorPages" Version="6.0.0" />
  </ItemGroup>

</Project>

MyApp/
├── Pages/
│   ├── Index.cshtml
│   └── Index.cshtml.cs
├── Program.cs
└── Startup.cs

dotnet add package Microsoft.AspNetCore.Mvc.RazorPages

@page
@model MyApp.Pages.IndexModel

<h1>Welcome to Razor Pages!</h1>
<p>@Model.Message</p>

using Microsoft.AspNetCore.Mvc.RazorPages;

namespace MyApp.Pages
{
    public class IndexModel : PageModel
    {
        public string Message { get; private set; } = "Hello, World!";

        public void OnGet()
        {
        }
    }
}