SkiaSharp XF Sample in .NETStandard 1.4

[JimSEOW]

I am testing bringing the XF Skiasharp sample to .NETStandard 1.4 for UWP
The only issue is instead of PCLStorage v1.0.2, I choose [PCLStorage.Standard compile with .NETStandard 1.4] (https://github.com/losttech/PCLStorage.Desktop/tree/netStandard)

Two samples fail

• CreatePdfSample
• CreateXpsSample
  because of dependency on FileSystem.cs which is missing in PCLStorage.Standard branch

[mattleibow]

@JimSEOW Thanks for looking into this. With .NET Standard 1.3+, there is no need for the PCLStorage as the File APIs (System.IO) are all available.

If we are going .NET Standard, rather switch to that API.

[JimSEOW]

@mattleibow UWP6.0 is expected to be released end of this month. By then, we could bring Xamarin Foms to .NET standard 2.0 for iOS, Android and UWP and then we could re-visit this topics.

[mattleibow]

I had a look, and managed to get the sample to .NET Standard: 37fae29

Thanks for the issue and the research. It is still a bit rough, (stable) Xamarin.Forms does not yet nicely support .NET Standard, so I had to add: <PackageTargetFallback>portable-net45+win8+wpa81+wp8</PackageTargetFallback> to the .csproj. Not too bad, but hopefully as soon as 2.4 goes stable, we can remove it.

Also, UWP is still a bit annoying, it doesn't support a pure .csproj format. I moved the package references into the project file, but I still have to keep that project.json around. All the other projects use the new packages format.