[Rider] Unable to Resolve Symbol 'LightGray' in Uno Platform

[ShahrukhYousafzai]

Current behavior

When using the UNO Platform, the symbol 'LightGray' is not recognized, resulting in error:

The symbol 'LightGray' is not recognized, but build works however these errors are pretty annoying as program do compiles properly

Expected behavior

The LightGray color should be resolved correctly, as it is a standard predefined color.

How to reproduce it (as minimally and precisely as possible)

Create a new UNO Platform project.
Try using "LightGray" or any Color in XAML.
Observe the error in the build output.

Workaround

No response

Works on UWP/WinUI

Yes

Environment

Target Platforms: (WinUI, Android, iOS, WebAssembly, macOS, Linux)
IDE & Version: (Visual Studio 2022, JetBrains Rider)

NuGet package version(s)

No response

Affected platforms

Tested on Windows

IDE

No response

IDE version

No response

Relevant plugins

No response

Anything else we need to know?

No response

[jeromelaban]

Thanks for the report.

This is indeed a known color:

uno/src/Uno.UI/UI/Colors.cs

Line 494 in 212316d

public static Color LightGray => _lightGray ??= FromInteger(unchecked((int)0xFFD3D3D3));

This looks like a Rider IDE issue that we cannot fix without help from the Rider team. It's likely best to open an issue on their tracker.

[ShahrukhYousafzai]

I do get the same errors about color on visual studio as well. And I do not get this LightGray or any color error on any other type of project. It happens only on UNO Platform project no matter if I use Rider or Visual Studio as you can see in the screenshots of both IDEs

[jeromelaban]

Thanks. Could you show a screenshot of the error you're seeing in visual studio?

[ShahrukhYousafzai]

I get a different error in Visual Studio, but it's still related to color. Why does this happen?

These errors are really frustrating because they don’t appear in any other type of project—only in UNO Platform.

[jeromelaban]

Thanks. This is indeed not the same error. As a workaround, if you have the net9.0-windows targetframework, select it at the top left corner of the editor.

Still, this is an issue we've been trying to fix for years but it seems that VS intellisense changed recently and #19642 will fix it. This will be present in an upcoming release of Uno.

For Rider, opening an issue on their bug tracker is the best way to have it fixed.

[MartinZikmund]

@jeromelaban should this be kept open?

[jeromelaban]

@MartinZikmund It's for rider, so I tend to think that it should.

[ShahrukhYousafzai]

Thank you, The workaround for the VS worked. Thanks for the great work and I had tried UNO Platform few years ago and now it has improved a lot. Amazing work!

[Takoooooo]

Created an issue for this one - https://youtrack.jetbrains.com/issue/RIDER-124060/Unable-to-Resolve-Symbol-for-XAML-Colors-in-Uno-Platform
Actually it seems we already have a similar issue opened - #18960 and also the similar issue in the Rider YT - https://youtrack.jetbrains.com/issue/RSRP-499591/Uno-Platform-XAML-Bugs
Should we close this one as a duplicate @MartinZikmund @jeromelaban ?

[RSReswin]

ha ha that is my rider ticket, i create the ticker before 3 months still not fixed.

i am now just selecting all error and ignoring it, it is annoying color error.

[Takoooooo]

Can you guys upvote the issue so the Rider team will more likely prioritize it?
https://youtrack.jetbrains.com/issue/RIDER-124060/Unable-to-Resolve-Symbol-for-XAML-Colors-in-Uno-Platform