App icon is not embedded when compiled on Ubuntu targeting Windows

[o-mdr]

Description

I have a cross-platform console dotnet core 5.0 application, here's a relevant extract from the .csproj file

<Project Sdk="Microsoft.NET.Sdk">
  <PropertyGroup>
    <OutputType>Exe</OutputType>
    <TargetFramework>net5.0</TargetFramework>
    <ApplicationIcon>main48.ico</ApplicationIcon>
  </PropertyGroup>
  ...
</Project>

When I publish it with dotnet publish on my laptop running Windows 10 x64, I get a foo.exe with the icon (yellow square).

When I publish it on the build machine running Ubuntu 18.04 LTS, the icon doesn't seem to be embedded correctly. When I download the published app from the build machine and open it in the Windows explorer, the icon is not there.

I am using the same source code, same project, but different platforms for the build.

I've also tried building the project on my laptop using VS Code with WSL Ubuntu 18.04 LTS. I observed the same outcome: binaries compiled on Ubuntu do not have an icon.

Affected commands:

dotnet build
dotnet publish
# Published as a single app or an app with separate dependencies

I expect that the icon gets embedded correctly during the build on Ubuntu, targeting Windows OS executables.

Configuration

• Which version of .NET is the code running on?

dotnet core 5.0

• What OS and version, and what distro if applicable?

Windows 10 x64, Ubuntu 18.04 LTS x64

• What is the architecture (x64, x86, ARM, ARM64)?

Application is compiled as Windows x86

• Do you know whether it is specific to that configuration?

Not sure

Regression?

Did not test in previous releases

I couldn't figure out the best area label to add to this issue. If you have write-permissions please help me learn by adding exactly one area label.

[o-mdr]

Will this issue be better suited here https://github.com/dotnet/sdk? Apologies if this is the wrong repo

[jkotas]

Duplicate of dotnet/sdk#3943