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The type or namespace name 'Hosting' does not exist in the namespace 'Microsoft.AspNetCore.Razor'

Trying to teach myself some new tools, but I've managed to break my project.

The solution is about a day old and consists of two projects. One is the application (created using the Visual Studio .NET Core 2.1 SDK + React Template), and the other is the data layer (which is just a Models folder).

Models

The data layer was implemented today, and that's when things got rocky. I don't want to point the finger there immediately, because it could've happened with some other changes I was making at the same time.

One or more compilation references are missing. Ensure that your project is referencing 'Microsoft.NET.Sdk.Web' and the 'PreserveCompilationContext' property is not set to false.

The type or namespace name 'Hosting' does not exist in the namespace
'Microsoft.AspNetCore.Razor' (are you missing an assembly reference?)

I've done my fair share of research and cannot resolve this issue. I've tried...

dotnet restore

bin

obj

_ViewImports.cshtml

@using

If I modify the HomeController Index() from returning the View() to instead [HttpGet] public string Index() => "Hello World!";, the text is returned without any error.

HomeController Index()

View()

[HttpGet] public string Index() => "Hello World!";

Index.cshtml

@{
ViewData["Title"] = "Home Page";
}

<div id="react-app">Loading...</div>

@section scripts {
<script src="~/dist/main.js" asp-append-version="true"></script>
}


HomeController.cs

using System.Diagnostics;
using Microsoft.AspNetCore.Mvc;

namespace world_cup_pools.Controllers
{
public class HomeController : Controller
{
public IActionResult Index()
{
return View();
}

public IActionResult Error()
{
ViewData["RequestId"] = Activity.Current?.Id ?? HttpContext.TraceIdentifier;
return View();
}
}
}


1 Answer
1

Shortly after posting this I've solved the issue.

I had upgraded my project to .NET Core 2.1 but one of the references (Microsoft.AspNetCore.All) was version 2.0.8.

Microsoft.AspNetCore.All

2.0.8

Upon updating this to 2.1.0, the project now works as expected.

2.1.0

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