[Build][Nuget] Microsoft.AI.MachineLearning.dll is not copied to the output folder.

[mrzade]

Describe the issue

Microsoft.AI.MachineLearning.dll is not copied to the output folder when compiling native C++/WinRT projects.
Nuget package version 1.20.1.

Urgency

No response

Target platform

Windows x64

Build script

There is no custom one. Only Nuget's .props/.targets are involved.

Error / output

The condition in csharp/src/Microsoft.AI.MachineLearning/Microsoft.AI.MachineLearning.targets, line 35 seems to be broken since 1.16.0:

<ItemGroup Condition="'$(NuGetProjectStyle)' != 'PackageReference' AND WinAppSDKPackageName == ''">

Shouldn't the WinAppSDKPackageName be an MSBuild variable?
Also, the Microsoft.AI.MachineLearning NuGet Settings rule never pops up in the project settings UI, but this is probably unrelated.

Visual Studio Version

17.9.6

GCC / Compiler Version

No response

[skottmckay]

Generally the C# packages are built via the CI using https://github.com/microsoft/onnxruntime/blob/main/csharp/OnnxRuntime.CSharp.proj.

What's the use-case where you need to build it locally?

[mrzade]

I'm not building the Nugets. I'm consuming them in the native C++/WinRT project.

[skottmckay]

@smk2007 Is this meant to be $(WinAppSDKPackageName)?

Also want to check that property name. I can't find any other reference to WinAppSDKPackageName in an internet search or the ORT codebase.