Can't target a specific version

[alons1]

I'm trying to target asp.net core 5.0.5
On my dev machine I've installed hosting bundle 5.0.5, 5.0.6 and I also have 5.0.7 sdk (5.0.301) which I got with VS 2019.
On my production env I have hosting bundle 5.0.5

When trying to run the project on prod, I get this in the browser:
HTTP Error 500.31 - Failed to load ASP.NET Core runtime

And this in the Event Viewer:

Could not find 'aspnetcorev2_inprocess.dll'. Exception message:
It was not possible to find any compatible framework version
The framework 'Microsoft.NETCore.App', version '5.0.7' was not found.
   The following frameworks were found:
      2.1.15 at [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
      3.1.1 at [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
      5.0.5 at [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]

You can resolve the problem by installing the specified framework and/or SDK.

I have this in my .csproj file

<PropertyGroup>
    <TargetFramework>net5.0</TargetFramework>
    <RuntimeFrameworkVersion>5.0.5</RuntimeFrameworkVersion>
    <Version>1.0.0</Version>
    <IsTransformWebConfigDisabled>true</IsTransformWebConfigDisabled>
    <OutputType>WinExe</OutputType>
    <EnableUnsafeBinaryFormatterSerialization>true</EnableUnsafeBinaryFormatterSerialization>
  </PropertyGroup>

And this in my web.config

<?xml version="1.0" encoding="utf-8"?>
<configuration>
  <location path="." inheritInChildApplications="false">
    <system.webServer>
      <handlers>
        <add name="aspNetCore" path="*" verb="*" modules="AspNetCoreModuleV2" resourceType="Unspecified" />
      </handlers>
      <aspNetCore processPath="bin\Release\net5.0\CouchbaseAPI.exe" arguments="" stdoutLogEnabled="false" stdoutLogFile=".\logs\" hostingModel="outofprocess">
        <environmentVariables>
          <environmentVariable name="ASPNETCORE_HTTPS_PORT" value="443" />
          <environmentVariable name="ASPNETCORE_ENVIRONMENT" value="Production" />
        </environmentVariables>
      </aspNetCore>
    </system.webServer>
  </location>
  <system.webServer>
    <httpErrors errorMode="Detailed" />
  </system.webServer>
</configuration>

I couldn't figure out the best area label to add to this issue. If you have write-permissions please help me learn by adding exactly one area label.

[BrennanConroy]

Can you share your runtime.config.json?

[alons1]

@BrennanConroy

{ "runtimeOptions": { "tfm": "net5.0", "framework": { "name": "Microsoft.AspNetCore.App", "version": "5.0.5" }, "configProperties": { "System.GC.Server": true, "System.Runtime.Serialization.EnableUnsafeBinaryFormatterSerialization": true } } }

[BrennanConroy]

That would explain why it's not looking for Microsoft.NetCore.App 5.0.5.
Try changing the file to have:

"frameworks": [
  {
    "name": "Microsoft.NETCore.App",
    "version": "5.0.5"
  },
  {
    "name": "Microsoft.AspNetCore.App",
    "version": "5.0.5"
  }
],

It is strange that RuntimeFrameworkVersion doesn't seem to be working though.

[BrennanConroy]

Looks like there was an issue with corehost that prevented the SDK from putting "Microsoft.NETCore.App" in the json file. dotnet/runtime#3402

This is fixed for .NET 6 https://github.com/dotnet/sdk/blob/bde62cad8916648b8ef6a94227f2b2d21bdde056/src/Tasks/Microsoft.NET.Build.Tasks/GenerateRuntimeConfigurationFiles.cs#L211-L214

One workaround would be to publish your app as self-contained.