Aspnetcore: FileLoadException: Could not load file or assembly System.Runtime, Version=4.2.0.0

[rosieks]

I have an asp.net core 2.0 application that runs on full .net framework 4.6.1. It works fine locally but when I deploy it to Azure I receive the following error:

FileLoadException: Could not load file or assembly 'System.Runtime, Version=4.2.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' or one of its dependencies. The located assembly's manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040)

Any idea how to fix that?

[burtonrodman]

I am having this issue. What was your resolution?

Visual Studio 2017.3, Framework 461, published to Windows Server 2012R2 with Framework 4.7 and .NetCore 2.0.0 Hosting installed.

[burtonrodman]

Found answer here:
https://stackoverflow.com/questions/45894659/fileloadexception-could-not-load-file-or-assembly-system-runtime-version-4-2-0

I started with a .Net Core app, switched to net461. Needed to delete all published artifacts and republish.

[techaimail]

In my scenario with the same kind of project but targeting net471 with Visual studio 2017 15.5.3 over windows 10 Home throws the same error:
No se puede cargar el archivo o ensamblado 'System.Runtime, Version=4.2.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' ni una de sus dependencias. El sistema no puede encontrar el archivo especificado.

[natemcmaster]

@techaimail can you open a separate issue with steps to reproduce the error?

[burtonrodman]

Anytime one switches frameworks or versions, bin and obj must be deleted (or full delete and rede ploy in production setting).