Develop Reference

UnitTests fail to run on Windows 11 ARm64 with hostpolicy.dll error

I have a Net6 application. I have added Unit tests for this. Before upgrading to NET6 everything worked. But after the upgrade I can no longer run UnitTests.
I have ARM64 Runtime installed. I have checked that the PATH is set.
I am using a Macbook with Apple M1 Max chip.
I get the following error message, and no idea how to fix this.
Microsoft.VisualStudio.TestPlatform.ObjectModel.TestPlatformException: Testhost process exited with error: Failed to load the dll from [C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.7\hostpolicy.dll], HRESULT: 0x800700C1
An error occurred while loading required library hostpolicy.dll from [C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.7]
. Please check the diagnostic logs for more information.
at Microsoft.VisualStudio.TestPlatform.CrossPlatEngine.Client.ProxyOperationManager.ThrowOnTestHostExited(Boolean testHostExited)
at Microsoft.VisualStudio.TestPlatform.CrossPlatEngine.Client.ProxyOperationManager.SetupChannel(IEnumerable`1 sources, String runSettings)
at Microsoft.VisualStudio.TestPlatform.CrossPlatEngine.Client.ProxyDiscoveryManager.DiscoverTests(DiscoveryCriteria discoveryCriteria, ITestDiscoveryEventsHandler2 eventHandler)
I checked the following item, which looked like the issue I encounter but I have 'AA64 machine (ARM64)' as expected at the bottom of the page.
Hope someone know how to help.

Some problem when I newly downloaded dotnet and C#

I recently tried to start c# and when I press 'dotnet run', vscode throws this type of error:
/home/user/HelloWorld/bin/Debug/net6.0/HelloWorld: relocation error: /home/user/HelloWorld/bin/Debug/net6.0/HelloWorld: symbol __pthread_key_create version GLIBC_2.2.5 not defined in file libpthread.so.0 with link time reference
Thanks in advance!

Did you installed Visual Studio-SDK and Runtime form snap?
If so, the easiest solution is to uninstall them using snap and install them using APT.
Ubuntu

(MT5210) Native linking failed, undefined symbol: _GULIsLoggableLevel. Xamarin.iOS

Today I try to download from nuget package manager MarcTron to use Ads in my app and when I try to run the project in debug mode I receive this error:
Error MT5210: Native linking failed, undefined symbol: _GULIsLoggableLevel. Please verify that all the necessary frameworks have been referenced and native libraries are properly linked in. (MT5210) (WeatherLocationInfo.iOS)
Another error is:
APMMeasurement networkUploadCompletionHandlerWithResponse: Error: ] in GoogleAppMeasurement(APMMeasurement_7b399ffe8f030717675febfa49640b5b.o) (WeatherLocationInfo.iOS)
When I delete the library everything is ok.
The same error I receive when I try to download Xamarin.Google.iOS.MobileAds.
How can I fix this issues ?

Can i build C# projects on Ubuntu with Jenkins?

We have Jenkins running on an Ubuntu OS 18.04.01 LTS and an older project written in C# / .NET 4.5
The application was always build manually in the past and I would like to use Jenkins to introduce CI so nobody needs to build the project manually anymore. The application does not have to run on Linux or anything like that, we just need the buildfiles (executables and DLL files). Is it possible to build this C# solution with Jenkins on Ubuntu?
I know about MONO and XBUILD but actually I can't manage to build the project under ubuntu because of different issues which do not happen under Windows, e.g. see here:
UserControls/ExpandablePanel.cs(33,35): error CS1043: Invalid accessor body `=>', expecting `;' or `{'
UserControls/ExpandablePanel.cs(33,66): error CS1043: Invalid accessor body `=>', expecting `;' or `{'
UserControls/ExpandablePanel.cs(35,41): error CS1043: Invalid accessor body `=>', expecting `;' or `{'
UserControls/ExpandablePanel.cs(37,40): error CS1043: Invalid accessor body `=>', expecting `;' or `{'
UserControls/ExpandablePanel.cs(133,22): error CS1644: Feature `pattern matching' cannot be used because it is not part of the C# 6.0 language specification
UserControls/PagedDataGridView.cs(441,68): error CS1043: Invalid accessor body `=>', expecting `;' or `{'
1 Warning(s)
6 Error(s)
Is it even possible or do I definitely need to run Jenkins on a Windows machine?

It is possible. You can build C# project on Linux/Ubuntu. Try building using mono. When you will install mono package, one of the binaries that you will get will be xbuild. To build just invoke the following command:
xbuild <path to csproj/solution file>
Try building this manually first and then integrate with jenkins.

MonoDevelop: Semi cryptic error CS0016

Here's the error I'm getting:
Error CS0016: Could not write to file Fact.Apprentice.Core', cause: Type '<>__AnonType02' was not completed. (CS0016) (Fact.Apprentice.Core - Mono)
If I compile using MonoDevelop + Microsoft .NET, no such error shows up. When using Mono framework, I am unable to compile because of this. Behavior identical for Mac or PC installation.

This kind of error usually indicates compiler bug. The most likely source will be some of your LINQ queries. You could also try Mono 2.11 which should give you better error message.