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Xamarin NLogLoggerProvider linker error

See original GitHub issue

Type: Bug

NLog version: 4.6.8 NLog.Extensions.Logging version: 1.6.2 NLog.Web.AspNetCore version: not used

Platform: Xamarin Android / Xamarin iOS

What is the current result? Using NLogLoggerProvider in a Release build (Link SDK assemblies enabled) on either platform results in a Linker error. I don’t know enough to guess whether it’s an issue in how this extension library is referencing classes from NLog, or if the Xamarin iOS/Android linkers are resulting in very similar issues due to common logic.
Are there any work arounds? yes Disabling linking globally does work, but not ideal for publishing apps. There may be a way to avoid the issue with linker exclusions, haven’t had any luck there though. Quick workaround has been to clone the library and remove the NLogLogger::BeginScope logic & parser.
To reproduce issue (tested in Visual Studio Mac with latest updates) Create new Xamarin iOS / Android project Add latest NLog.Extensions.Logging package Add code to create an instance of NLogLoggerProvider Rebuild in release mode (Link SDK Frameworks/Assemblies enabled).
Exception details (message, stacktrace, inner exceptions)

Xamarin.iOS

MTOUCH : error MT2101: Can’t resolve the reference ‘System.IDisposable NLog.MappedDiagnosticsLogicalContext::SetScoped(System.Collections.Generic.IReadOnlyList1<System.Collections.Generic.KeyValuePair2<System.String,System.Object>>)’, referenced from the method ‘System.IDisposable NLog.Extensions.Logging.NLogBeginScopeParser/ScopeProperties::CreateScopeProperties(System.Object,System.Collections.Generic.IReadOnlyList1<System.Collections.Generic.KeyValuePair2<System.String,System.Object>>)’ in ‘NLog, Version=4.0.0.0, Culture=neutral, PublicKeyToken=5120e14c03d0593c’.

Xamarin.Android

error XALNK7000: Mono.Linker.MarkException: Error processing method: ‘System.IDisposable NLog.Extensions.Logging.NLogBeginScopeParser/ScopeProperties::CreateScopeProperties(System.Object,System.Collections.Generic.IReadOnlyList1<System.Collections.Generic.KeyValuePair2<System.String,System.Object>>)’ in assembly: ‘NLog.Extensions.Logging.dll’ —> Mono.Cecil.ResolutionException: Failed to resolve System.IDisposable NLog.MappedDiagnosticsLogicalContext::SetScoped(System.Collections.Generic.IReadOnlyList1<System.Collections.Generic.KeyValuePair2<System.String,System.Object>>)