Hi. I developed a UWP app with desktop bridge that enables AppService feature following MSFT's sample code on GitHub . In my solution file, I have projects as below: UWP app project UWP class library project Google FlatBuffers .NET class library project Desktop Bridge (C++ desktop application project) Windows application packaging project (adding UWP app and bridge app as references) For some reasons, I need to create a sideload package and submit it via Partner Center. After creating the package (extension name is msixbundle) from WAP project and trying to upload it to store, it shows "You cannot submit pre-compiled .NET Native packages". Could anyone provide some tips for me to solve this problem?

According to Roy's comments, to create a package for uploading to Microsoft Store, it is necessary to use a developer account to associate the application with the store by Visual Studio. After that, you can use the publish wizard or MakeAppx to create upload package for uploading to Microsoft Store.

Failed to submit UWP app with an error "You cannot submit pre-compiled .NET Native packages"

PeterWu 191

Hi.
I developed a UWP app with desktop bridge that enables AppService feature following MSFT's sample code on GitHub.

In my solution file, I have projects as below:

UWP app project
UWP class library project
Google FlatBuffers .NET class library project
Desktop Bridge (C++ desktop application project)
Windows application packaging project (adding UWP app and bridge app as references)

For some reasons, I need to create a sideload package and submit it via Partner Center.
After creating the package (extension name is msixbundle) from WAP project and trying to upload it to store, it shows "You cannot submit pre-compiled .NET Native packages".
Could anyone provide some tips for me to solve this problem?

Roy Li - MSFT 32,646 Reputation points Microsoft Vendor

2021-01-20T02:19:26.05+00:00

Please create an uploaded file for the Store submission instead of creating a sideload package.
PeterWu 191 Reputation points

2021-01-20T02:25:09.007+00:00

Hi Roy,
We develop UWP for 3rd party and we may not be added to their dev account.
Therefore, we need to confirm if it is possible to create a package and send it to our customers.

I have seen that this is possible in the past from MSFT developer's blog and official document.
Is it still accepted by MSFT?
Roy Li - MSFT 32,646 Reputation points Microsoft Vendor

2021-01-20T02:41:51.363+00:00

You could create a sideload app and install it on your local device. But the Store will not accept a sideload package for submission. If you want to submit the package to the store for submission, please go through the document I posted to create an upload package.
PeterWu 191 Reputation points

2021-01-20T02:46:37.407+00:00

How about this section in your posted document?
It shows it is possible to create an upload package and upload it via partner center.
If it is correct, I have already followed the steps but I still got the same error message.
Roy Li - MSFT 32,646 Reputation points Microsoft Vendor

2021-01-20T03:04:20.533+00:00

Yes, it's a way to create the upload file manually. But based on the result, it looks like the upload package is not correct. So could you please create the upload package with Visual Studio directly?
Roy Li - MSFT 32,646 Reputation points Microsoft Vendor

2021-01-20T03:08:00.203+00:00

And another thing is that please make sure you've associated the app with the partner center. The store will not accept a package that is not associated with the store, like a sideload pacakge.
PeterWu 191 Reputation points

2021-01-20T03:09:20.747+00:00

Ok, I will try it.
Besides, I have used runFullTrust capability and it seems I need to submit a form to MSFT.
However, the submit link I found is dead.
Could you please provide a new link for me?
Roy Li - MSFT 32,646 Reputation points Microsoft Vendor

2021-01-20T03:18:34.577+00:00

No, currently, you don't need to submit an extra form for submission.

When you are creating a submission for your app, you need to complete some configuration. One of them is called Submission options. If you are using Restricted capabilities in your app, at the bottom of that page, there will be a place for input. Then you just need to tell the Store team why your app needs to declare the capability and how it is used. Be sure to provide as much detail as possible to help us understand why your product needs to declare the capability.
PeterWu 191 Reputation points

2021-01-22T03:08:03.417+00:00

Hi Roy,
I can upload the msixupload package which is created by Create App Packages -> distribute to Microsoft Store as company name.
I have also found that the msixbundle file in above package is a far cry from sideload package.
I think this is the reason why I cannot create upload package manually.
Could you advice on how can I create a complete upload package manually?
Roy Li - MSFT 32,646 Reputation points Microsoft Vendor

2021-01-22T07:46:38.203+00:00

We do not suggest developers create upload packages manually.

If you insist on creating a package on your own, maybe you could try Create an MSIX package or bundle with MakeAppx.exe.
PeterWu 191 Reputation points

2021-01-22T07:53:10.057+00:00

Hi Roy,
Thank you for your information.
I am not sure if our customers can set up our MSFT account as a developer account belonging to their organization or not.
Therefore, I need to know if it is possible to create the package manually.
Roy Li - MSFT 32,646 Reputation points Microsoft Vendor

2021-01-22T08:22:10.107+00:00

Well, the important thing is that your project must be associated with the store before you package your app. And it will be better to update the association every time you want to create an update package. This is not related to how you package your app but it is required.
PeterWu 191 Reputation points

2021-01-22T08:27:55.98+00:00

Do you mean, even though I use MakeAppx to create a package manually, I still need to associate the project with store before creating it?
If yes, I still need to get the company's developer account for associating the application, right?
If I still need to get the account, the MakeAppx still cannot solve the problem I may run into...
So, there is no way to create a package for other companies to publish it without having their developer account, right?
Roy Li - MSFT 32,646 Reputation points Microsoft Vendor

2021-01-22T08:38:20.073+00:00

Yes, that's the key point. If you are not possible to associate with the store, then you might need someone who could log in to the developer account to create the upload package.
PeterWu 191 Reputation points

2021-01-22T08:42:20.177+00:00

OK, I got it.
I really appreciate all your effort.

Accepted answer

PeterWu 191 Reputation points

2021-01-22T08:51:51.237+00:00

According to Roy's comments, to create a package for uploading to Microsoft Store, it is necessary to use a developer account to associate the application with the store by Visual Studio.
After that, you can use the publish wizard or MakeAppx to create upload package for uploading to Microsoft Store.
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