Bug: WinFX.targets was not found

From @HamedMasafi on December 25, 2018 8:31

I have installed dotnet core 3 preview on opensuse leap 15.0 The file that I downloaded is: https://dotnet.microsoft.com/download/thank-you/dotnet-sdk-3.0.100-preview-009812-linux-x64-binaries

I’ve try to build an app:

hamed@linux-f1fa:~/tmp/> mkdir -p dwin && cd dwin

hamed@linux-f1fa:~/tmp/dwin> /opt/apps/dotnet/dotnet new winforms       

Welcome to .NET Core!
---------------------
Learn more about .NET Core: https://aka.ms/dotnet-docs
Use 'dotnet --help' to see available commands or visit: https://aka.ms/dotnet-cli-docs

Telemetry
---------
The .NET Core tools collect usage data in order to help us improve your experience. The data is anonymous. It is collected by Microsoft and shared with the community. You can opt-out of telemetry by setting the DOTNET_CLI_TELEMETRY_OPTOUT environment variable to '1' or 'true' using your favorite shell.

Read more about .NET Core CLI Tools telemetry: https://aka.ms/dotnet-cli-telemetry

ASP.NET Core
------------
Successfully installed the ASP.NET Core HTTPS Development Certificate.
To trust the certificate run 'dotnet dev-certs https --trust' (Windows and macOS only). For establishing trust on other platforms refer to the platform specific documentation.
For more information on configuring HTTPS see https://go.microsoft.com/fwlink/?linkid=848054.
Getting ready...
The template "Windows Forms Application" was created successfully.

Processing post-creation actions...
Running 'dotnet restore' on /home/hamed/tmp/dwin/dwin.csproj...
  Restoring packages for /home/hamed/tmp/dwin/dwin.csproj...
  Installing Microsoft.NETCore.DotNetAppHost 3.0.0-preview-27122-01.
  Installing Microsoft.NETCore.DotNetHostResolver 3.0.0-preview-27122-01.
  Installing NETStandard.Library 2.0.3.
  Installing Microsoft.NETCore.DotNetHostPolicy 3.0.0-preview-27122-01.
  Installing Microsoft.NETCore.Platforms 3.0.0-preview.18571.3.
  Installing Microsoft.NETCore.Platforms 2.0.0.
  Installing Microsoft.NETCore.Targets 2.0.0.
  Installing Microsoft.NETCore.App 3.0.0-preview-27122-01.
  Installing Microsoft.WindowsDesktop.App 3.0.0-alpha-27128-4.
  Installing runtime.linux-x64.Microsoft.NETCore.DotNetAppHost 3.0.0-preview-27122-01.
  Installing runtime.linux-x64.Microsoft.NETCore.DotNetHostResolver 3.0.0-preview-27122-01.
  Installing runtime.linux-x64.Microsoft.NETCore.DotNetHostPolicy 3.0.0-preview-27122-01.
  Installing runtime.linux-x64.Microsoft.NETCore.App 3.0.0-preview-27122-01.
  Generating MSBuild file /home/hamed/tmp/dwin/obj/dwin.csproj.nuget.g.props.
  Generating MSBuild file /home/hamed/tmp/dwin/obj/dwin.csproj.nuget.g.targets.
  Restore completed in 4.87 min for /home/hamed/tmp/dwin/dwin.csproj.

Restore succeeded.

hamed@linux-f1fa:~/tmp/dwin> /opt/apps/dotnet/dotnet run
/opt/apps/dotnet/sdk/3.0.100-preview-009812/Sdks/Microsoft.NET.Sdk.WindowsDesktop/targets/Microsoft.NET.Sdk.WindowsDesktop.targets(14,2): error MSB4019: The imported project "/opt/apps/dotnet/sdk/3.0.100-preview-009812/Sdks/Microsoft.NET.Sdk.WindowsDesktop/targets/Microsoft.WinFX.targets" was not found. Confirm that the path in the <Import> declaration is correct, and that the file exists on disk. [/home/hamed/tmp/dwin/dwin.csproj]

The build failed. Please fix the build errors and run again.

The file exists but in other case:

/opt/apps/dotnet/sdk/3.0.100-preview-009812/Sdks/Microsoft.NET.Sdk.WindowsDesktop/targets/Microsoft.WinFx.targets

The ‘x’ on WinFx is lower but dotnet expect to it be upper.

I’ve created a copy with this command but I know is not good way for solving bugs

cp /opt/apps/dotnet/sdk/3.0.100-preview-009812/Sdks/Microsoft.NET.Sdk.WindowsDesktop/targets/Microsoft.WinF{x,X}.targets

Copied from original issue: dotnet/coreclr#21673

[livarcocc]

We don’t support compiling winforms and wpf outside of windows. This is by design.

[AidanMcK]

The causes problem on Mac OS X case-sensitive systems also. Making symlinks for both the target and the props file to the correct case is a workaround (not a fix).

e.g.

cd /usr/local/share/dotnet/sdk/3.1.200/Sdks/Microsoft.NET.Sdk.WindowsDesktop/targets
sudo ln -s Microsoft.WinFx.targets Microsoft.WinFX.targets
sudo ln -s Microsoft.WinFx.props Microsoft.WinFX.props