UWP Package project encountering "Could not load file or assembly 'System.Memory" error on XmlSerializer"

Question

UWP Package project encountering "Could not load file or assembly 'System.Memory" error on XmlSerializer"

SmilingMoon 981

When running Package project with UWP dependency,
it causes "Could not load file or assembly 'System.Memory" error on XmlSerializer.Deserialize() method.
Here is the test solution you can download and run it:
https://1drv.ms/u/s!AqB-HjXxUE9ngeJNkU6QOUFd3W6E3w?e=mEpZB2

With out of box simple test project, it happens.

Anonymous

2021-11-30T08:27:22.227+00:00

I checked the sample, Since you are not using desktop bridge to launch a desktop app inside your app, would you mind telling me why you are trying to package a UWP app inside a Windows application package project?
SmilingMoon 981 Reputation points

2021-11-30T16:34:46.093+00:00

I do use the desktop bridge in the main app. This app is just a temp project to reproduce the error for you to take a look easily.
I think there is significant issue on package project regarding the "cannot load..". No official guideline document to avoid the issue or no way to configure the package project to avoid the issue.
I think they need to improve the error handling and the configuration for the package project. It keep breaking it.
Or, am I missing something? Please help here.

Thank you,

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Anonymous

2021-11-30T08:27:22.227+00:00

I checked the sample, Since you are not using desktop bridge to launch a desktop app inside your app, would you mind telling me why you are trying to package a UWP app inside a Windows application package project?
SmilingMoon 981 Reputation points

2021-11-30T16:34:46.093+00:00

I do use the desktop bridge in the main app. This app is just a temp project to reproduce the error for you to take a look easily.
I think there is significant issue on package project regarding the "cannot load..". No official guideline document to avoid the issue or no way to configure the package project to avoid the issue.
I think they need to improve the error handling and the configuration for the package project. It keep breaking it.
Or, am I missing something? Please help here.

Thank you,

Answer 1

Anonymous

Hello,

Welcome to Microsoft Q&A!

@SmilingMoon You could try to add <Target Name="ResolvePackageDependenciesForBuild" /> this into the project file of the packaging project.

Like this:

  <ItemGroup>  
    <ProjectReference Include="..\TestUWP\TestUWP.csproj" />  
  </ItemGroup>  
  <Target Name="ResolvePackageDependenciesForBuild" />  
</Project>

After adding this, I could run your sample correctly without exceptions.

Thank you.

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SmilingMoon 981 Reputation points

2021-12-01T05:58:43.93+00:00

It works! The issue on my main app has been resolved.
Could you share any link to an document related to that? I couldn't find any official document supporting the solution. I want to learn what I missed.

Thank you!
Anonymous

2021-12-01T06:25:23.63+00:00

@SmilingMoon I have to say that there is no document for this. This solution comes from another engineer who had met a similar question before.
SmilingMoon 981 Reputation points

2021-12-01T17:21:42.303+00:00

I'm glad there was another person who found the solution before me.

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UWP Package project encountering "Could not load file or assembly 'System.Memory" error on XmlSerializer"

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