Cannot find compilation library location for package 'Microsoft.NETCore.App'

[hannespreishuber]

Deploying a ASP.NET Core 2.2 Project to IIS 10 with Visual Studio 2017 (an 2019) via FTP
-works: No Pages Folder on Webs server

Adding a in visula Studio Project a Razor Page without a model class - deploy just this page

open page in Browser Error
--Cannot find compilation library location for package 'Microsoft.NETCore.App'

Startup.cs contains
services.AddMvc().AddRazorOptions(options => options.AllowRecompilingViewsOnFileChange = true);
(should be Default?)

csproj

<Project Sdk="Microsoft.NET.Sdk.Web">
  <PropertyGroup>
    <TargetFramework>netcoreapp2.2</TargetFramework>
    <UserSecretsId>7c38072d-0407-48bb-8abc-96cc1d96ac2f</UserSecretsId>
    <TypeScriptToolsVersion>3.1</TypeScriptToolsVersion>
<MvcRazorExcludeRefAssembliesFromPublish>false</MvcRazorExcludeRefAssembliesFromPublish> 
 <MvcRazorCompileOnPublish>false</MvcRazorCompileOnPublish>
  </PropertyGroup>

using Project Sdk="Microsoft.NET.Sdk.Web> cause Project Sdk="Microsoft.NET.Sdk.Razor" missing the Publishing templates for azure and iis.

cshtml page should be dynamic compiled razore page on first request or filesystem watcher changed event

complete callstack http://coredemo.ppedv.de/tinyPage

[mkArtakMSFT]

Thanks for contacting us, @hannespreishuber.
@pranavkm, can you please look into this? Thanks!

[pranavkm]

The flags look correct. Can you tell if the refs folder is part of the publish output? If it's not, try running dotnet publish /bl and attach the generated msbuild.binlog

[hannespreishuber]

there is no refs folder on published Website (done with Visual Studio)

msbuild.zip

[pranavkm]

At least when you do a local publish, the build log says that publishing produces a refs folder.

Perhaps try doing a clean publish to see if that works? If you continue having trouble with it, I'd recommend using the VS feedback tool to report an issue. In the meanwhile, you could FTP copy the locally produced refs folder to the server to unblock yourself.

[hannespreishuber]

I have done the repro several times, delete all files, publish all, create new Razor page, publish page
there are even no BIN or debug Folders. All DLLs are in root of Website?
so what profile is dotnet publish /bl using?

[pranavkm]

@vijayrkn would you be able to help here?

[hannespreishuber]

ok, found the local bin\debug…\publish Folder and copied the refs Folder to Website - and now it works
magic-
Bug in Visual Studio?
btw where in docu is something written about the refs Folder?

[pranavkm]

Bug in Visual Studio?

I'd recommend filing a VS feedback issue so that it can be tracked by the right folks. There isn't a Razor SDK \ runtime issue here.

btw where in docu is something written about the refs Folder?

I am not aware of any documentation for Microsoft.NET.Sdk which is responsible for producing the refs directory.

[IanGleeson]

I'm having an issue with this as well.

I've published my Net Core 2.2 application to Azure App Service and receive this message "Cannot find compilation library location for package 'Microsoft.NETCore.App'"

I then add the ref folder as mentioned above and it works again. The issue I have is that it is much slower now than it used to be. Looking at Chrome Inspector the TimeToFirstByte for some pages can go over 15 seconds. Could this solution cause this? If so, does anyone know a fix?

[pranavkm]

Hi, it looks like you are posting on a closed issue/PR/commit!

We're very likely to lose track of your bug/feedback/question unless you:

1. Open a new issue
2. Explain very clearly what you need help with
3. If you think you have found a bug, include detailed repro steps so that we can investigate the problem

Thanks!

[IanGleeson]

Cheers, I'll do that.