ClickOnce deployment does not install as expected

Question

I have a WPF application developed with .NET 4.61, and I use ClickOnce to deploy the application. The publishing phase runs without error, but when I try to install, the installer downloads .NET 4.61 as expected. Once done (after a restart), it gives an error stating the assembly System.drawing.primitives.dll version 4.0.2.0 needs to be installed in the GAC.

Does not .NET 461 install assemblies in the GAC by default?

Information

• Windows 10 64 bits

• Visual Studio 2017

PS: The same problem is present on my development machine.

Answer 1

I am able to replicate this issue, but don't know enough to be able to answer your question clearly, but maybe it may help someone more knowledgeable to help answer it.

It appears to be an issue related to a WPF application referencing a .NET Standard 2.0 class library.

Here are the steps to reproduce:

• Create a new Solution with a WPF App in Visual Studio 2017 with File > New Project> Visual c# > WPF App (.NET Framework)
• Build and Publish. The WPF App runs fine
• Add a new Project to the Solution with File > Add > New Project > Visual C# > .NET Standard > Class Library > .NET Standard (.NET Framework 4.6.1)
• Add a Reference from the WPF App to the .NET Standard Class Library.
• Build and Publish and attempt to install.

Get an Error "Unable to install or run the application. The Application requires that assembly System.Drawing.Primitives Version 4.0.2.0 be installed in the Global Assembly Cache first.

I have this simple project reproduced in git.

https://github.com/colhountech/WPF_With_NetStandard

Hope this helps someone to resolve it. I've got the same issue with a simple WPF project I am trying unsuccessfully to resolve.