Aspnetcore: Build Error when referencing a bunch of standard libraries

[TFTomSun]

First of all: Thanks for the great work. I love that project and I want to support it as much as i can.

I started with a simple Blazor (not hosted) project and referenced some of my existing .net standard projects incl. some 3rd party packages like selenium (WebDriver and WebDriver.Support) and Docker.DotNet.

When I try to build the app I get the following build error:

Severity    Code    Description Project File    Line    Suppression State
Error   MSB3073 The command "dotnet "C:\Development\Git\Nuget\packages\microsoft.aspnetcore.blazor.build\0.1.0\targets\../tools/illink/illink.dll" -c link -u link -t --verbose  -d "C:\Development\Git\Nuget\packages\microsoft.aspnetcore.blazor.build\0.1.0\targets\../tools/mono/bcl/" -d "C:\Development\Git\Nuget\packages\microsoft.aspnetcore.blazor.build\0.1.0\targets\../tools/mono/bcl/Facades/" -o "C:\Development\Git\FFXIVCollector.WebApi\FFXIVCollector.BlazorApp\obj\Debug\netstandard2.0\blazor/linker/" -x "C:\Development\Git\Nuget\packages\microsoft.aspnetcore.blazor.build\0.1.0\targets\BuiltInBclLinkerDescriptor.xml" -x "C:\Development\Git\FFXIVCollector.WebApi\FFXIVCollector.BlazorApp\obj\Debug\netstandard2.0\blazor\linker.descriptor.xml" -a "C:\Development\Git\Nuget\packages\docker.dotnet\3.125.1\lib\netstandard2.0\Docker.DotNet.dll" -a "C:\Development\Git\Nuget\packages\microsoft.aspnetcore.blazor\0.1.0\lib\netstandard2.0\Microsoft.AspNetCore.Blazor.dll" -a "C:\Development\Git\Nuget\packages\microsoft.aspnetcore.blazor.browser\0.1.0\lib\netstandard2.0\Microsoft.AspNetCore.Blazor.Browser.dll" -a "C:\Program Files\dotnet\sdk\NuGetFallbackFolder\microsoft.csharp\4.3.0\lib\netstandard1.3\Microsoft.CSharp.dll" -a "C:\Program Files\dotnet\sdk\NuGetFallbackFolder\microsoft.extensions.dependencyinjection\2.0.0\lib\netstandard2.0\Microsoft.Extensions.DependencyInjection.dll" -a "C:\Program Files\dotnet\sdk\NuGetFallbackFolder\microsoft.extensions.dependencyinjection.abstractions\2.0.0\lib\netstandard2.0\Microsoft.Extensions.DependencyInjection.Abstractions.dll" -a "C:\Development\Git\Nuget\packages\newtonsoft.json\10.0.3\lib\netstandard1.3\Newtonsoft.Json.dll" -a "C:\Development\Git\Nuget\packages\selenium.support\3.10.0\lib\netstandard2.0\WebDriver.Support.dll" -a "C:\Development\Git\Nuget\packages\selenium.webdriver\3.10.0\lib\netstandard2.0\WebDriver.dll" -a "C:\Program Files\dotnet\sdk\NuGetFallbackFolder\system.buffers\4.4.0\lib\netstandard2.0\System.Buffers.dll" -a "C:\Program Files\dotnet\sdk\NuGetFallbackFolder\system.collections.nongeneric\4.3.0\lib\netstandard1.3\System.Collections.NonGeneric.dll" -a "C:\Program Files\dotnet\sdk\NuGetFallbackFolder\system.collections.specialized\4.3.0\lib\netstandard1.3\System.Collections.Specialized.dll" -a "C:\Program Files\dotnet\sdk\NuGetFallbackFolder\system.componentmodel\4.3.0\lib\netstandard1.3\System.ComponentModel.dll" -a "C:\Program Files\dotnet\sdk\NuGetFallbackFolder\system.componentmodel.primitives\4.3.0\lib\netstandard1.0\System.ComponentModel.Primitives.dll" -a "C:\Program Files\dotnet\sdk\NuGetFallbackFolder\system.componentmodel.typeconverter\4.3.0\lib\netstandard1.5\System.ComponentModel.TypeConverter.dll" -a "C:\Program Files\dotnet\sdk\NuGetFallbackFolder\system.dynamic.runtime\4.3.0\lib\netstandard1.3\System.Dynamic.Runtime.dll" -a "C:\Program Files\dotnet\sdk\NuGetFallbackFolder\system.io.filesystem.primitives\4.3.0\lib\netstandard1.3\System.IO.FileSystem.Primitives.dll" -a "C:\Program Files\dotnet\sdk\NuGetFallbackFolder\system.linq\4.3.0\lib\netstandard1.6\System.Linq.dll" -a "C:\Program Files\dotnet\sdk\NuGetFallbackFolder\system.linq.expressions\4.3.0\lib\netstandard1.6\System.Linq.Expressions.dll" -a "C:\Program Files\dotnet\sdk\NuGetFallbackFolder\system.objectmodel\4.3.0\lib\netstandard1.3\System.ObjectModel.dll" -a "C:\Program Files\dotnet\sdk\NuGetFallbackFolder\system.reflection.emit\4.3.0\lib\netstandard1.3\System.Reflection.Emit.dll" -a "C:\Program Files\dotnet\sdk\NuGetFallbackFolder\system.reflection.emit.ilgeneration\4.3.0\lib\netstandard1.3\System.Reflection.Emit.ILGeneration.dll" -a "C:\Program Files\dotnet\sdk\NuGetFallbackFolder\system.reflection.emit.lightweight\4.3.0\lib\netstandard1.3\System.Reflection.Emit.Lightweight.dll" -a "C:\Program Files\dotnet\sdk\NuGetFallbackFolder\system.reflection.typeextensions\4.3.0\lib\netstandard1.5\System.Reflection.TypeExtensions.dll" -a "C:\Program Files\dotnet\sdk\NuGetFallbackFolder\system.runtime.serialization.formatters\4.3.0\lib\netstandard1.4\System.Runtime.Serialization.Formatters.dll" -a "C:\Program Files\dotnet\sdk\NuGetFallbackFolder\system.runtime.serialization.primitives\4.3.0\lib\netstandard1.3\System.Runtime.Serialization.Primitives.dll" -a "C:\Program Files\dotnet\sdk\NuGetFallbackFolder\system.text.regularexpressions\4.3.0\lib\netstandard1.6\System.Text.RegularExpressions.dll" -a "C:\Program Files\dotnet\sdk\NuGetFallbackFolder\system.threading\4.3.0\lib\netstandard1.3\System.Threading.dll" -a "C:\Program Files\dotnet\sdk\NuGetFallbackFolder\system.threading.tasks.extensions\4.3.0\lib\netstandard1.0\System.Threading.Tasks.Extensions.dll" -a "C:\Program Files\dotnet\sdk\NuGetFallbackFolder\system.xml.readerwriter\4.3.0\lib\netstandard1.3\System.Xml.ReaderWriter.dll" -a "C:\Program Files\dotnet\sdk\NuGetFallbackFolder\system.xml.xmldocument\4.3.0\lib\netstandard1.3\System.Xml.XmlDocument.dll" -a "C:\Development\Git\FFXIVCollector.WebApi\FFXIVCollector.BusinessLogic\bin\Debug\netstandard2.0\FFXIVCollector.BusinessLogic.dll" -a "C:\Development\Git\NetStandard.Extensions\TomSun.NetStandard.Extensions\bin\Debug\netstandard1.0\TomSun.NetStandard.Extensions.dll" -a "C:\Development\Git\NetStandard.Platform\TomSun.NetStandard.Platform\bin\Debug\netstandard1.0\TomSun.NetStandard.Platform.dll" -a "C:\Development\Git\Selenium.Extensions\TomSun.Selenium.Extensions\bin\Debug\netstandard2.0\TomSun.Selenium.Extensions.dll" -a "C:\Development\Git\FFXIVCollector.WebApi\FFXIVCollector.BlazorApp\obj\Debug\netstandard2.0\FFXIVCollector.BlazorApp.dll"" exited with code 1. FFXIVCollector.BlazorApp    C:\Development\Git\Nuget\packages\microsoft.aspnetcore.blazor.build\0.1.0\targets\Blazor.MonoRuntime.targets    429 

The build output is:

1>------ Build started: Project: FFXIVCollector.BlazorApp, Configuration: Debug Any CPU ------
1>----- Smart Resolve References -----
1>FFXIVCollector.BlazorApp -> C:\Development\Git\FFXIVCollector.WebApi\FFXIVCollector.BlazorApp\bin\Debug\netstandard2.0\FFXIVCollector.BlazorApp.dll
1>Cannot find declaration of exported type 'System.Threading.Semaphore' from the assembly 'System.Threading, Version=4.0.12.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'
1>Cannot find declaration of exported type 'System.Reflection.Emit.DynamicMethod' from the assembly 'System.Reflection.Emit.Lightweight, Version=4.0.2.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'
1>Processing embedded resource linker descriptor: mscorlib.xml
1>Fatal error in IL Linker
1>Mono.Linker.MarkException: Error processing method: 'System.Boolean System.Linq.Expressions.Compiler.ILGen::ShouldLdtoken(System.Reflection.MethodBase)' in assembly: 'System.Linq.Expressions.dll' ---> Mono.Cecil.ResolutionException: Failed to resolve System.Reflection.Emit.DynamicMethod
1>   at Mono.Linker.Steps.MarkStep.HandleUnresolvedType(TypeReference reference)
1>   at Mono.Linker.Steps.MarkStep.MarkType(TypeReference reference)
1>   at Mono.Linker.Steps.MarkStep.MarkInstruction(Instruction instruction)
1>   at Mono.Linker.Steps.MarkStep.MarkMethodBody(MethodBody body)
1>   at Mono.Linker.Steps.MarkStep.ProcessMethod(MethodDefinition method)
1>   at Mono.Linker.Steps.MarkStep.ProcessQueue()
1>   --- End of inner exception stack trace ---
1>   at Mono.Linker.Steps.MarkStep.ProcessQueue()
1>   at Mono.Linker.Steps.MarkStep.ProcessPrimaryQueue()
1>   at Mono.Linker.Steps.MarkStep.Process()
1>   at Mono.Linker.Steps.MarkStep.Process(LinkContext context)
1>   at Mono.Linker.Pipeline.Process(LinkContext context)
1>   at Mono.Linker.Driver.Run(ILogger customLogger)
1>   at Mono.Linker.Driver.Execute(String[] args, ILogger customLogger)
1>C:\Development\Git\Nuget\packages\microsoft.aspnetcore.blazor.build\0.1.0\targets\Blazor.MonoRuntime.targets(429,5): error MSB3073: The command "dotnet "C:\Development\Git\Nuget\packages\microsoft.aspnetcore.blazor.build\0.1.0\targets\../tools/illink/illink.dll" -c link -u link -t --verbose  -d "C:\Development\Git\Nuget\packages\microsoft.aspnetcore.blazor.build\0.1.0\targets\../tools/mono/bcl/" -d "C:\Development\Git\Nuget\packages\microsoft.aspnetcore.blazor.build\0.1.0\targets\../tools/mono/bcl/Facades/" -o "C:\Development\Git\FFXIVCollector.WebApi\FFXIVCollector.BlazorApp\obj\Debug\netstandard2.0\blazor/linker/" -x "C:\Development\Git\Nuget\packages\microsoft.aspnetcore.blazor.build\0.1.0\targets\BuiltInBclLinkerDescriptor.xml" -x "C:\Development\Git\FFXIVCollector.WebApi\FFXIVCollector.BlazorApp\obj\Debug\netstandard2.0\blazor\linker.descriptor.xml" -a "C:\Development\Git\Nuget\packages\docker.dotnet\3.125.1\lib\netstandard2.0\Docker.DotNet.dll" -a "C:\Development\Git\Nuget\packages\microsoft.aspnetcore.blazor\0.1.0\lib\netstandard2.0\Microsoft.AspNetCore.Blazor.dll" -a "C:\Development\Git\Nuget\packages\microsoft.aspnetcore.blazor.browser\0.1.0\lib\netstandard2.0\Microsoft.AspNetCore.Blazor.Browser.dll" -a "C:\Program Files\dotnet\sdk\NuGetFallbackFolder\microsoft.csharp\4.3.0\lib\netstandard1.3\Microsoft.CSharp.dll" -a "C:\Program Files\dotnet\sdk\NuGetFallbackFolder\microsoft.extensions.dependencyinjection\2.0.0\lib\netstandard2.0\Microsoft.Extensions.DependencyInjection.dll" -a "C:\Program Files\dotnet\sdk\NuGetFallbackFolder\microsoft.extensions.dependencyinjection.abstractions\2.0.0\lib\netstandard2.0\Microsoft.Extensions.DependencyInjection.Abstractions.dll" -a "C:\Development\Git\Nuget\packages\newtonsoft.json\10.0.3\lib\netstandard1.3\Newtonsoft.Json.dll" -a "C:\Development\Git\Nuget\packages\selenium.support\3.10.0\lib\netstandard2.0\WebDriver.Support.dll" -a "C:\Development\Git\Nuget\packages\selenium.webdriver\3.10.0\lib\netstandard2.0\WebDriver.dll" -a "C:\Program Files\dotnet\sdk\NuGetFallbackFolder\system.buffers\4.4.0\lib\netstandard2.0\System.Buffers.dll" -a "C:\Program Files\dotnet\sdk\NuGetFallbackFolder\system.collections.nongeneric\4.3.0\lib\netstandard1.3\System.Collections.NonGeneric.dll" -a "C:\Program Files\dotnet\sdk\NuGetFallbackFolder\system.collections.specialized\4.3.0\lib\netstandard1.3\System.Collections.Specialized.dll" -a "C:\Program Files\dotnet\sdk\NuGetFallbackFolder\system.componentmodel\4.3.0\lib\netstandard1.3\System.ComponentModel.dll" -a "C:\Program Files\dotnet\sdk\NuGetFallbackFolder\system.componentmodel.primitives\4.3.0\lib\netstandard1.0\System.ComponentModel.Primitives.dll" -a "C:\Program Files\dotnet\sdk\NuGetFallbackFolder\system.componentmodel.typeconverter\4.3.0\lib\netstandard1.5\System.ComponentModel.TypeConverter.dll" -a "C:\Program Files\dotnet\sdk\NuGetFallbackFolder\system.dynamic.runtime\4.3.0\lib\netstandard1.3\System.Dynamic.Runtime.dll" -a "C:\Program Files\dotnet\sdk\NuGetFallbackFolder\system.io.filesystem.primitives\4.3.0\lib\netstandard1.3\System.IO.FileSystem.Primitives.dll" -a "C:\Program Files\dotnet\sdk\NuGetFallbackFolder\system.linq\4.3.0\lib\netstandard1.6\System.Linq.dll" -a "C:\Program Files\dotnet\sdk\NuGetFallbackFolder\system.linq.expressions\4.3.0\lib\netstandard1.6\System.Linq.Expressions.dll" -a "C:\Program Files\dotnet\sdk\NuGetFallbackFolder\system.objectmodel\4.3.0\lib\netstandard1.3\System.ObjectModel.dll" -a "C:\Program Files\dotnet\sdk\NuGetFallbackFolder\system.reflection.emit\4.3.0\lib\netstandard1.3\System.Reflection.Emit.dll" -a "C:\Program Files\dotnet\sdk\NuGetFallbackFolder\system.reflection.emit.ilgeneration\4.3.0\lib\netstandard1.3\System.Reflection.Emit.ILGeneration.dll" -a "C:\Program Files\dotnet\sdk\NuGetFallbackFolder\system.reflection.emit.lightweight\4.3.0\lib\netstandard1.3\System.Reflection.Emit.Lightweight.dll" -a "C:\Program Files\dotnet\sdk\NuGetFallbackFolder\system.reflection.typeextensions\4.3.0\lib\netstandard1.5\System.Reflection.TypeExtensions.dll" -a "C:\Program Files\dotnet\sdk\NuGetFallbackFolder\system.runtime.serialization.formatters\4.3.0\lib\netstandard1.4\System.Runtime.Serialization.Formatters.dll" -a "C:\Program Files\dotnet\sdk\NuGetFallbackFolder\system.runtime.serialization.primitives\4.3.0\lib\netstandard1.3\System.Runtime.Serialization.Primitives.dll" -a "C:\Program Files\dotnet\sdk\NuGetFallbackFolder\system.text.regularexpressions\4.3.0\lib\netstandard1.6\System.Text.RegularExpressions.dll" -a "C:\Program Files\dotnet\sdk\NuGetFallbackFolder\system.threading\4.3.0\lib\netstandard1.3\System.Threading.dll" -a "C:\Program Files\dotnet\sdk\NuGetFallbackFolder\system.threading.tasks.extensions\4.3.0\lib\netstandard1.0\System.Threading.Tasks.Extensions.dll" -a "C:\Program Files\dotnet\sdk\NuGetFallbackFolder\system.xml.readerwriter\4.3.0\lib\netstandard1.3\System.Xml.ReaderWriter.dll" -a "C:\Program Files\dotnet\sdk\NuGetFallbackFolder\system.xml.xmldocument\4.3.0\lib\netstandard1.3\System.Xml.XmlDocument.dll" -a "C:\Development\Git\FFXIVCollector.WebApi\FFXIVCollector.BusinessLogic\bin\Debug\netstandard2.0\FFXIVCollector.BusinessLogic.dll" -a "C:\Development\Git\NetStandard.Extensions\TomSun.NetStandard.Extensions\bin\Debug\netstandard1.0\TomSun.NetStandard.Extensions.dll" -a "C:\Development\Git\NetStandard.Platform\TomSun.NetStandard.Platform\bin\Debug\netstandard1.0\TomSun.NetStandard.Platform.dll" -a "C:\Development\Git\Selenium.Extensions\TomSun.Selenium.Extensions\bin\Debug\netstandard2.0\TomSun.Selenium.Extensions.dll" -a "C:\Development\Git\FFXIVCollector.WebApi\FFXIVCollector.BlazorApp\obj\Debug\netstandard2.0\FFXIVCollector.BlazorApp.dll"" exited with code 1.
1>Done building project "FFXIVCollector.BlazorApp.csproj" -- FAILED.
========== Build: 0 succeeded, 1 failed, 4 up-to-date, 0 skipped ==========

Is there somewhere a "not yet supported" list?

[conficient]

Blazor is built using mono-wasm as the base .NET framework implementation, and in this case I believe it's a missing method in mono-wasm that's the issue.

Cannot find declaration of exported type 'System.Threading.Semaphore' from the assembly 'System.Threading ...

[grahamehorner]

@conficient @TFTomSun at present Mono WASM has no support for threading; check the repo https://github.com/lrz/mono-wasm-mono for more info

[danroth27]

@kumpera

[danroth27]

@javiercn Can you take a look at what's happening here? Is this an issue with the linker? With Mono's .NET Standard support? Something else?

[TFTomSun]

@javiercn
Let me know tell me if you need a reproducible scenario.

If threading and the expression stuff is not supported by mono wasm i would at least prefer to get a error message, that points me to the exact method or code line that is not compilable. As it is at the moment, I don't know how to workaround that issue.

[mserradotnet]

Hi,

I ran into the same issue with the default Blazor template (not hosted).

It builds and runs fine, but then just adding Newtonsoft.Json as a dependency (dotnet add package Newtonsoft.Json) followed by a 'dotnet build' throws the mentioned error by @TFTomSun .

I'm on MacOS

[kumpera]

Mono has support for System.Linq.Expression without the SRE based compiler. I need to see why it's not enabled on our setup.

[marek-safar]

The problem is that WASM is not netstandard compliant right now and there is no TFM for WASM as of today for us to customize it.

As a hack you can use the assembly I attached which should unlock you on this matter if you use it as a replacement for the same one in bin folder (e.g. using post-build copy)
System.Reflection.Emit.Lightweight.dll.zip

[robertsundstrom]

@marek-safar OK. How do I set this up?

I tried this in my project file:

 <Target Name="CopyFiles" BeforeTargets="GetCopyToOutputDirectoryItems">
     <Copy SourceFiles="System.Reflection.Emit.Lightweight.dll" DestinationFolder="$(OutputPath)" ContinueOnError="true" />
  </Target>

Can't make this work. I get the same error.

[robertsundstrom]

The workaround works by replacing the corresponding file System.Reflection.Emit.Lightweight.dll in ~/.nuget/packages/system.reflection.emit.lightweight/4.3.0/lib/netstandard1.3/

[mserradotnet]

@robertsundstrom Thank you, this builds fine with your method.

[SteveSandersonMS]

@TFTomSun, @robertsundstrom, @marek-safar: Can you supply a simple repro for this?

I tried referencing System.Threading.Semaphore and Newtonsoft.Json.JsonConvert from a Blazor app and it still compiled fine. I'm not saying they would necessarily work at runtime (didn't check), but the comments above say there's a compile-time error.

[robertsundstrom]

@SteveSandersonMS Sure. I got that error while compiling this without the workaround: https://github.com/robertsundstrom/ChatSample-WebAssembly-SignalR

[SteveSandersonMS]

Note to future bug-fixer: For an easily repro, see https://github.com/aspnet/Blazor/issues/436

[TFTomSun]

@robertsundstrom I tried your workaround and copied the dll into the folder:
Nugetpackagesmicrosoft.aspnetcore.blazor.build0.1.0toolsmonobclFacades
Thats the only folder under my nuget package root that contains a dll with the same name. When I replace the dll I still get the same error. Any idea what i' doing wrong?

[robertsundstrom]

@TFTomSun The directory to place it in is ~/.nuget/packages/system.reflection.emit.lightweight/4.3.0/lib/netstandard1.3

~ in the path is your home-directory.

[TFTomSun]

Thanks. got it. I wasn't aware of all that nuget package folders. Actually i thought when i specify my own folder via nuget.config, all package will be downloaded into this folder. Seems that nuget is still looking in the users folder, even if a nuget.config is in place.

My approach is now to delete the packages folder under the users folder and all nugetfallback folders. I got the package downloaded into my "specified" folder. Unfortunately i still get the same build error. I'll tryout a bit more and add some feedback here later.

[TFTomSun]

@robertsundstrom

ah... actually i get only one of the two errors now. This one is leftover:

Cannot find declaration of exported type 'System.Threading.Semaphore' from the assembly 'System.Threading, Version=4.0.12.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'

Any chance to workaround that too?

Edit:
Got it buildable now. The build error was actually another one. I just saw the same message in the output and thought that the threading stuff still fails my build.

[chassq]

This may be the same issue for me when trying to add System.Linq.Dynamic.Core to the Blazor Client project. Adding the system.reflection.emit.lightweight.dll file mentioned above did not seem to help.

I get compile time errors as follows:

Severity Code Description Project File Line Suppression State
Error MSB3073 The command "dotnet "C:Userssqadmin.nugetpackagesmicrosoft.aspnetcore.blazor.build0.1.0targets../tools/illink/illink.dll" -c link -u link -t --verbose -d "C:Userssqadmin.nugetpackagesmicrosoft.aspnetcore.blazor.build0.1.0targets../tools/mono/bcl/" -d "C:Userssqadmin.nugetpackagesmicrosoft.aspnetcore.blazor.build0.1.0targets../tools/mono/bcl/Facades/" -o "C:UserssqadminsourcereposTestBlazorProjTestBlazorProjTestBlazorProj.ClientobjDebugnetstandard2.0blazor/linker/" -x "C:Userssqadmin.nugetpackagesmicrosoft.aspnetcore.blazor.build0.1.0targetsBuiltInBclLinkerDescriptor.xml" -x "C:UserssqadminsourcereposTestBlazorProjTestBlazorProjTestBlazorProj.ClientobjDebugnetstandard2.0blazorlinker.descriptor.xml" -a "C:Userssqadmin.nugetpackagesmicrosoft.aspnetcore.blazor0.1.0libnetstandard2.0Microsoft.AspNetCore.Blazor.dll" -a "C:Userssqadmin.nugetpackagesmicrosoft.aspnetcore.blazor.browser0.1.0libnetstandard2.0Microsoft.AspNetCore.Blazor.Browser.dll" -a "C:Program FilesdotnetsdkNuGetFallbackFoldermicrosoft.extensions.dependencyinjection2.0.0libnetstandard2.0Microsoft.Extensions.DependencyInjection.dll" -a "C:Program FilesdotnetsdkNuGetFallbackFoldermicrosoft.extensions.dependencyinjection.abstractions2.0.0libnetstandard2.0Microsoft.Extensions.DependencyInjection.Abstractions.dll" -a "C:Program FilesdotnetsdkNuGetFallbackFoldersystem.collections.concurrent4.3.0libnetstandard1.3System.Collections.Concurrent.dll" -a "C:Program FilesdotnetsdkNuGetFallbackFoldersystem.collections.nongeneric4.3.0libnetstandard1.3System.Collections.NonGeneric.dll" -a "C:Program FilesdotnetsdkNuGetFallbackFoldersystem.collections.specialized4.3.0libnetstandard1.3System.Collections.Specialized.dll" -a "C:Program FilesdotnetsdkNuGetFallbackFoldersystem.componentmodel4.3.0libnetstandard1.3System.ComponentModel.dll" -a "C:Program FilesdotnetsdkNuGetFallbackFoldersystem.componentmodel.primitives4.3.0libnetstandard1.0System.ComponentModel.Primitives.dll" -a "C:Program FilesdotnetsdkNuGetFallbackFoldersystem.componentmodel.typeconverter4.3.0libnetstandard1.5System.ComponentModel.TypeConverter.dll" -a "C:Program FilesdotnetsdkNuGetFallbackFoldersystem.dynamic.runtime4.3.0libnetstandard1.3System.Dynamic.Runtime.dll" -a "C:Program FilesdotnetsdkNuGetFallbackFoldersystem.linq4.3.0libnetstandard1.6System.Linq.dll" -a "C:Userssqadmin.nugetpackagessystem.linq.dynamic.core1.0.8.3libnetstandard2.0System.Linq.Dynamic.Core.dll" -a "C:Program FilesdotnetsdkNuGetFallbackFoldersystem.linq.expressions4.3.0libnetstandard1.6System.Linq.Expressions.dll" -a "C:Userssqadmin.nugetpackagessystem.linq.queryable4.3.0libnetstandard1.3System.Linq.Queryable.dll" -a "C:Program FilesdotnetsdkNuGetFallbackFoldersystem.objectmodel4.3.0libnetstandard1.3System.ObjectModel.dll" -a "C:Program FilesdotnetsdkNuGetFallbackFoldersystem.reflection.emit4.3.0libnetstandard1.3System.Reflection.Emit.dll" -a "C:Program FilesdotnetsdkNuGetFallbackFoldersystem.reflection.emit.ilgeneration4.3.0libnetstandard1.3System.Reflection.Emit.ILGeneration.dll" -a "C:Program FilesdotnetsdkNuGetFallbackFoldersystem.reflection.emit.lightweight4.3.0libnetstandard1.3System.Reflection.Emit.Lightweight.dll" -a "C:Program FilesdotnetsdkNuGetFallbackFoldersystem.reflection.typeextensions4.3.0libnetstandard1.5System.Reflection.TypeExtensions.dll" -a "C:Program FilesdotnetsdkNuGetFallbackFoldersystem.threading4.3.0libnetstandard1.3System.Threading.dll" -a "C:UserssqadminsourcereposTestBlazorProjTestBlazorProjTestBlazorProj.SharedbinDebugnetstandard2.0TestBlazorProj.Shared.dll" -a "C:UserssqadminsourcereposTestBlazorProjTestBlazorProjTestBlazorProj.ClientobjDebugnetstandard2.0TestBlazorProj.Client.dll"" exited with code 1. TestBlazorProj.Client C:Userssqadmin.nugetpackagesmicrosoft.aspnetcore.blazor.build0.1.0targetsBlazor.MonoRuntime.targets 429

[SteveSandersonMS]

OK. For now if you want to use those assemblies you'll need to disable linking via <BlazorLinkOnBuild>false</BlazorLinkOnBuild> in your csproj file.

Later on we'll:

• Tweak the default linking config to preserve whatever's needed to make the libraries work with linking
• Make it easier for developers to provide their own linking config so you can fix these problems on your own

Hopefully for a very large majority of commonly-used NuGet packages, we can provide a built-in config that makes it work out-of-the-box.

[chassq]

Not sure if this is related (or a blazor issue) but wanted to submit it. When trying to use System.Linq.Dynamic.Core NuGet pkg I get the following error when trying to use the Dynamic Linq OrderBy(string) overload. Error and sample code follow:

ERROR:

MonoPlatform.ts:85 Uncaught Error: System.TypeInitializationException: The type initializer for 'System.Linq.Dynamic.Core.DynamicQueryableExtensions' threw an exception. ---> System.InvalidOperationException: Sequence contains no matching element
  at System.Linq.Enumerable.Single[TSource] (System.Collections.Generic.IEnumerable`1[T] source, System.Func`2[T,TResult] predicate) <0x1e2bfd8 + 0x000e0> in <d120aeb8020649c4beeadecdff0b90a6>:0 
  at System.Linq.Dynamic.Core.DynamicQueryableExtensions.GetMethod (System.String name, System.Int32 parameterCount, System.Func`2[T,TResult] predicate) <0x1e2bac8 + 0x00056> in <94a13b5566d042a5a17d981cb7d5870e>:0 
  at System.Linq.Dynamic.Core.DynamicQueryableExtensions..cctor () <0x1e20120 + 0x0015a> in <94a13b5566d042a5a17d981cb7d5870e>:0 
   --- End of inner exception stack trace ---
  at TestBlazorProj.Client.Pages.PeopleData.SortClientSide () <0x1e1f8a0 + 0x00036> in <cff7510823de412ea0de57c1b5639e03>:0 
  at (wrapper delegate-invoke) <Module>.invoke_void()
  at Microsoft.AspNetCore.Blazor.Components.BlazorComponent+<>c__DisplayClass22_0.<onclick>b__0 (Microsoft.AspNetCore.Blazor.UIEventArgs _) <0x1e1f660 + 0x00014> in <6f55c2fa30114054ab77a67cb3b359ec>:0 
  at (wrapper delegate-invoke) <Module>.invoke_void_UIEventArgs(Microsoft.AspNetCore.Blazor.UIEventArgs)
  at Microsoft.AspNetCore.Blazor.Components.BlazorComponent.Microsoft.AspNetCore.Blazor.Components.IHandleEvent.HandleEvent (Microsoft.AspNetCore.Blazor.UIEventHandler handler, Microsoft.AspNetCore.Blazor.UIEventArgs args) <0x1e1f4f0 + 0x00018> in <6f55c2fa30114054ab77a67cb3b359ec>:0 
  at Microsoft.AspNetCore.Blazor.Rendering.ComponentState.DispatchEvent (Microsoft.AspNetCore.Blazor.UIEventHandler handler, Microsoft.AspNetCore.Blazor.UIEventArgs eventArgs) <0x1e1cef0 + 0x00034> in <6f55c2fa30114054ab77a67cb3b359ec>:0 
  at Microsoft.AspNetCore.Blazor.Rendering.Renderer.DispatchEvent (System.Int32 componentId, System.Int32 eventHandlerId, Microsoft.AspNetCore.Blazor.UIEventArgs eventArgs) <0x1e1cb58 + 0x00050> in <6f55c2fa30114054ab77a67cb3b359ec>:0 
  at Microsoft.AspNetCore.Blazor.Browser.Rendering.BrowserRenderer.DispatchBrowserEvent (System.Int32 componentId, System.Int32 eventHandlerId, Microsoft.AspNetCore.Blazor.UIEventArgs eventArgs) <0x1e1c9f0 + 0x00020> in <aa678c00565443a1a03daf9fa7da0de1>:0 
  at Microsoft.AspNetCore.Blazor.Browser.Rendering.BrowserRendererEventDispatcher.DispatchEvent (System.String eventDescriptorJson, System.String eventArgsJson) <0x1db8c28 + 0x0005a> in <aa678c00565443a1a03daf9fa7da0de1>:0 
  at System.Linq.Enumerable.Single[TSource] (System.Collections.Generic.IEnumerable`1[T] source, System.Func`2[T,TResult] predicate) <0x1e2bfd8 + 0x000e0> in <d120aeb8020649c4beeadecdff0b90a6>:0 
  at System.Linq.Dynamic.Core.DynamicQueryableExtensions.GetMethod (System.String name, System.Int32 parameterCount, System.Func`2[T,TResult] predicate) <0x1e2bac8 + 0x00056> in <94a13b5566d042a5a17d981cb7d5870e>:0 
  at System.Linq.Dynamic.Core.DynamicQueryableExtensions..cctor () <0x1e20120 + 0x0015a> in <94a13b5566d042a5a17d981cb7d5870e>:0 
   --- End of inner exception stack trace ---
  at TestBlazorProj.Client.Pages.PeopleData.SortClientSide () <0x1e1f8a0 + 0x00036> in <cff7510823de412ea0de57c1b5639e03>:0 
  at (wrapper delegate-invoke) <Module>.invoke_void()
  at Microsoft.AspNetCore.Blazor.Components.BlazorComponent+<>c__DisplayClass22_0.<onclick>b__0 (Microsoft.AspNetCore.Blazor.UIEventArgs _) <0x1e1f660 + 0x00014> in <6f55c2fa30114054ab77a67cb3b359ec>:0 
  at (wrapper delegate-invoke) <Module>.invoke_void_UIEventArgs(Microsoft.AspNetCore.Blazor.UIEventArgs)
  at Microsoft.AspNetCore.Blazor.Components.BlazorComponent.Microsoft.AspNetCore.Blazor.Components.IHandleEvent.HandleEvent (Microsoft.AspNetCore.Blazor.UIEventHandler handler, Microsoft.AspNetCore.Blazor.UIEventArgs args) <0x1e1f4f0 + 0x00018> in <6f55c2fa30114054ab77a67cb3b359ec>:0 
  at Microsoft.AspNetCore.Blazor.Rendering.ComponentState.DispatchEvent (Microsoft.AspNetCore.Blazor.UIEventHandler handler, Microsoft.AspNetCore.Blazor.UIEventArgs eventArgs) <0x1e1cef0 + 0x00034> in <6f55c2fa30114054ab77a67cb3b359ec>:0 
  at Microsoft.AspNetCore.Blazor.Rendering.Renderer.DispatchEvent (System.Int32 componentId, System.Int32 eventHandlerId, Microsoft.AspNetCore.Blazor.UIEventArgs eventArgs) <0x1e1cb58 + 0x00050> in <6f55c2fa30114054ab77a67cb3b359ec>:0 
  at Microsoft.AspNetCore.Blazor.Browser.Rendering.BrowserRenderer.DispatchBrowserEvent (System.Int32 componentId, System.Int32 eventHandlerId, Microsoft.AspNetCore.Blazor.UIEventArgs eventArgs) <0x1e1c9f0 + 0x00020> in <aa678c00565443a1a03daf9fa7da0de1>:0 
  at Microsoft.AspNetCore.Blazor.Browser.Rendering.BrowserRendererEventDispatcher.DispatchEvent (System.String eventDescriptorJson, System.String eventArgsJson) <0x1db8c28 + 0x0005a> in <aa678c00565443a1a03daf9fa7da0de1>:0 
    at Object.callMethod (http://localhost:50296/_framework/blazor.js:439:23)
    at raiseEvent (http://localhost:50296/_framework/blazor.js:927:28)
    at HTMLButtonElement.listener [as _blazorClickListener] (http://localhost:50296/_framework/blazor.js:814:56)
callMethod @ MonoPlatform.ts:85
raiseEvent @ BrowserRenderer.ts:310
listener @ BrowserRenderer.ts:183

CODE:

@using TestBlazorProj.Shared.people
@using System.Linq
@using System.Linq.Dynamic.Core

@page "/people/list"
@inject HttpClient Http


<h1>People Data</h1>
<p>List people data.</p>

@if (people == null)
{
    <p><em>Loading...</em></p>
}
else
{
    <button @onclick(SortClientSide)> Sort Table </button>

    <table class='table'>
        <thead>
            <tr>
                <th>Prefix</th>
                <th>First Name</th>
                <th>Middle Name</th>
                <th>Last Name</th>
                <th>Suffix</th>
            </tr>
        </thead>
        <tbody>
            @foreach (var p in people)
            {
                <tr>
                    <td>@p.Prefix</td>
                    <td>@p.FirstName</td>
                    <td>@p.MiddleName</td>
                    <td>@p.LastName</td>
                    <td>@p.Suffix</td>
                </tr>
            }
        </tbody>
    </table>
}

@functions {
    IEnumerable<PeopleVm> people;

    protected override async Task OnInitAsync()
    {
        //people = await Http.GetJsonAsync<IEnumerable<PeopleVm>>("/people/list");
        people = new List<PeopleVm>
                        {
                            new PeopleVm {Prefix = "Mr.", FirstName = "Person1FName", LastName = "Person1LName", MiddleName="Person1MName", Suffix = "" },
                            new PeopleVm {Prefix = "Mr.", FirstName = "Person2FName", LastName = "Person2LName", MiddleName="Person2MName", Suffix = "Sr." },
                            new PeopleVm {Prefix = "Mr.", FirstName = "Person3FName", LastName = "Person3LName", MiddleName="Person3MName", Suffix = "Jr." },
                            new PeopleVm {Prefix = "Ms.", FirstName = "Person4FName", LastName = "Person4LName", MiddleName="Person4MName", Suffix = "" },
                        };
    }

    private void SortClientSide()
    {
        //dynamic linq
        if(people != null)
        {
            var q = people.AsQueryable<PeopleVm>();
            var pq = q.OrderBy("MiddleName");
            //var pq = q.OrderBy(p => p.MiddleName); //This works!
            people = pq.ToList();
        }

        //standard linq
        //people = people.OrderByDescending(p => p.MiddleName).ToList();
    }
}

[kumpera]

CC @marek-safar @mhutch

[DNF-SaS]

+1 for random (at least they look random to me) build errors when using a lot of nuget-packages.

[SteveSandersonMS]

@DNF-SaS If you have information about which specific packages make the linker throw that would be helpful.

[DNF-SaS]

@SteveSandersonMS Sure, use the following lines as .csproj in a default blazor project.

<Project Sdk="Microsoft.NET.Sdk.Web">
  <PropertyGroup>
    <TargetFramework>netstandard2.0</TargetFramework>
    <RunCommand>dotnet</RunCommand>
    <RunArguments>blazor serve</RunArguments>
    <RestoreSources>
      $(RestoreSources);
      https://api.nuget.org/v3/index.json;
      https://dotnet.myget.org/f/blazor-dev/api/v3/index.json;
    </RestoreSources>
    <LangVersion>7.3</LangVersion>
  </PropertyGroup>

  <ItemGroup>
    <PackageReference Include="Flurl.Http" Version="2.3.1" />
    <PackageReference Include="Humanizer.Core.de" Version="2.2.0" />
    <PackageReference Include="Microsoft.AspNetCore.SignalR.Client" Version="1.0.0-preview2-final" />
    <PackageReference Include="Microsoft.AspNetCore.WebUtilities" Version="2.1.0-preview2-final" />
    <PackageReference Include="MimeKit" Version="2.0.3" />
    <PackageReference Include="Newtonsoft.Json" Version="11.0.2" />

    <PackageReference Include="Microsoft.AspNetCore.Blazor.Browser" Version="0.3.0-preview1-10252" />
    <PackageReference Include="Microsoft.AspNetCore.Blazor.Build" Version="0.3.0-preview1-10252" />
    <DotNetCliToolReference Include="Microsoft.AspNetCore.Blazor.Cli" Version="0.3.0-preview1-10252" />
  </ItemGroup>

</Project>

Error is

1>Target _LinkBlazorApplication:
1>  Fatal error in IL Linker
1>  Mono.Cecil.AssemblyResolutionException: Failed to resolve assembly: 'c:\temp\WebApplication11\WebApplication11\obj\Debug\netstandard20\WebApplication11.dll, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null' ---> Mono.Cecil.AssemblyResolutionException: Failed to resolve assembly: 'c:\temp\WebApplication11\WebApplication11\obj\Debug\netstandard20\WebApplication11.dll, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null'
1>     at Mono.Linker.DirectoryAssemblyResolver.Resolve(AssemblyNameReference name, ReaderParameters parameters)
1>     at Mono.Linker.AssemblyResolver.Resolve(AssemblyNameReference name, ReaderParameters parameters)
1>     at Mono.Linker.LinkContext.Resolve(IMetadataScope scope)
1>     at Mono.Linker.LinkContext.Resolve(IMetadataScope scope)
1>     at Mono.Linker.LinkContext.Resolve(String name)
1>     at Mono.Linker.Steps.ResolveFromAssemblyStep.Process()
1>     at Mono.Linker.Steps.BaseStep.Process(LinkContext context)
1>     at Mono.Linker.Pipeline.Process(LinkContext context)
1>     at Mono.Linker.Driver.Run(ILogger customLogger)
1>     at Mono.Linker.Driver.Execute(String[] args, ILogger customLogger)
1>  C:\Users\SaS\.nuget\packages\microsoft.aspnetcore.blazor.build\0.3.0-preview1-10252\targets\Blazor.MonoRuntime.targets(435,5): error MSB3073: The command "dotnet "C:\Users\SaS\.nuget\packages\microsoft.aspnetcore.blazor.build\0.3.0-preview1-10252\targets\../tools/illink/illink.dll" -c link -u link -t --verbose  -d "C:\Users\SaS\.nuget\packages\microsoft.aspnetcore.blazor.build\0.3.0-preview1-10252\targets\../tools/mono/bcl/" -d "C:\Users\SaS\.nuget\packages\microsoft.aspnetcore.blazor.build\0.3.0-preview1-10252\targets\../tools/mono/bcl/Facades/" -o "c:\temp\WebApplication11\WebApplication11\obj\Debug\netstandard2.0\blazor/linker/" -x "C:\Users\SaS\.nuget\packages\microsoft.aspnetcore.blazor.build\0.3.0-preview1-10252\targets\BuiltInBclLinkerDescriptor.xml" -x "c:\temp\WebApplication11\WebApplication11\obj\Debug\netstandard2.0\blazor\linker.descriptor.xml" -a "C:\Users\SaS\.nuget\packages\flurl\2.7.1\lib\netstandard2.0\Flurl.dll" -a "C:\Users\SaS\.nuget\packages\flurl.http\2.3.1\lib\netstandard2.0\Flurl.Http.dll" -a "C:\Users\SaS\.nuget\packages\humanizer.core\2.2.0\lib\netstandard1.0\Humanizer.dll" -a "C:\Users\SaS\.nuget\packages\microsoft.aspnetcore.blazor\0.3.0-preview1-10252\lib\netstandard2.0\Microsoft.AspNetCore.Blazor.dll" -a "C:\Users\SaS\.nuget\packages\microsoft.aspnetcore.blazor.browser\0.3.0-preview1-10252\lib\netstandard2.0\Microsoft.AspNetCore.Blazor.Browser.dll" -a "C:\Users\SaS\.nuget\packages\microsoft.aspnetcore.connections.abstractions\2.1.0-preview2-final\lib\netstandard2.0\Microsoft.AspNetCore.Connections.Abstractions.dll" -a "C:\Users\SaS\.nuget\packages\microsoft.aspnetcore.http.connections.client\1.0.0-preview2-final\lib\netstandard2.0\Microsoft.AspNetCore.Http.Connections.Client.dll" -a "C:\Users\SaS\.nuget\packages\microsoft.aspnetcore.http.connections.common\1.0.0-preview2-final\lib\netstandard2.0\Microsoft.AspNetCore.Http.Connections.Common.dll" -a "C:\Users\SaS\.nuget\packages\microsoft.aspnetcore.http.features\2.1.0-preview2-final\lib\netstandard2.0\Microsoft.AspNetCore.Http.Features.dll" -a "C:\Users\SaS\.nuget\packages\microsoft.aspnetcore.signalr.client\1.0.0-preview2-final\lib\netstandard2.0\Microsoft.AspNetCore.SignalR.Client.dll" -a "C:\Users\SaS\.nuget\packages\microsoft.aspnetcore.signalr.client.core\1.0.0-preview2-final\lib\netstandard2.0\Microsoft.AspNetCore.SignalR.Client.Core.dll" -a "C:\Users\SaS\.nuget\packages\microsoft.aspnetcore.signalr.common\1.0.0-preview2-final\lib\netstandard2.0\Microsoft.AspNetCore.SignalR.Common.dll" -a "C:\Users\SaS\.nuget\packages\microsoft.aspnetcore.webutilities\2.1.0-preview2-final\lib\netstandard2.0\Microsoft.AspNetCore.WebUtilities.dll" -a "C:\Users\SaS\.nuget\packages\microsoft.extensions.configuration\2.1.0-preview2-final\lib\netstandard2.0\Microsoft.Extensions.Configuration.dll" -a "C:\Users\SaS\.nuget\packages\microsoft.extensions.configuration.abstractions\2.1.0-preview2-final\lib\netstandard2.0\Microsoft.Extensions.Configuration.Abstractions.dll" -a "C:\Users\SaS\.nuget\packages\microsoft.extensions.configuration.binder\2.1.0-preview2-final\lib\netstandard2.0\Microsoft.Extensions.Configuration.Binder.dll" -a "C:\Users\SaS\.nuget\packages\microsoft.extensions.dependencyinjection\2.0.0\lib\netstandard2.0\Microsoft.Extensions.DependencyInjection.dll" -a "C:\Users\SaS\.nuget\packages\microsoft.extensions.dependencyinjection.abstractions\2.1.0-preview2-final\lib\netstandard2.0\Microsoft.Extensions.DependencyInjection.Abstractions.dll" -a "C:\Users\SaS\.nuget\packages\microsoft.extensions.logging\2.1.0-preview2-final\lib\netstandard2.0\Microsoft.Extensions.Logging.dll" -a "C:\Users\SaS\.nuget\packages\microsoft.extensions.logging.abstractions\2.1.0-preview2-final\lib\netstandard2.0\Microsoft.Extensions.Logging.Abstractions.dll" -a "C:\Users\SaS\.nuget\packages\microsoft.extensions.logging.configuration\2.1.0-preview2-final\lib\netstandard2.0\Microsoft.Extensions.Logging.Configuration.dll" -a "C:\Users\SaS\.nuget\packages\microsoft.extensions.logging.console\2.1.0-preview2-final\lib\netstandard2.0\Microsoft.Extensions.Logging.Console.dll" -a "C:\Users\SaS\.nuget\packages\microsoft.extensions.options\2.1.0-preview2-final\lib\netstandard2.0\Microsoft.Extensions.Options.dll" -a "C:\Users\SaS\.nuget\packages\microsoft.extensions.options.configurationextensions\2.1.0-preview2-final\lib\netstandard2.0\Microsoft.Extensions.Options.ConfigurationExtensions.dll" -a "C:\Users\SaS\.nuget\packages\microsoft.extensions.primitives\2.1.0-preview2-final\lib\netstandard2.0\Microsoft.Extensions.Primitives.dll" -a "C:\Users\SaS\.nuget\packages\microsoft.net.http.headers\2.1.0-preview2-final\lib\netstandard2.0\Microsoft.Net.Http.Headers.dll" -a "C:\Users\SaS\.nuget\packages\mimekit\2.0.3\lib\netstandard2.0\MimeKit.dll" -a "C:\Users\SaS\.nuget\packages\newtonsoft.json\11.0.2\lib\netstandard2.0\Newtonsoft.Json.dll" -a "C:\Users\SaS\.nuget\packages\portable.bouncycastle\1.8.1.3\lib\netstandard2.0\BouncyCastle.Crypto.dll" -a "C:\Users\SaS\.nuget\packages\system.buffers\4.5.0-preview2-26406-04\lib\netstandard2.0\System.Buffers.dll" -a "C:\Users\SaS\.nuget\packages\system.collections.concurrent\4.3.0\lib\netstandard1.3\System.Collections.Concurrent.dll" -a "C:\Users\SaS\.nuget\packages\system.data.common\4.3.0\lib\netstandard1.2\System.Data.Common.dll" -a "C:\Users\SaS\.nuget\packages\system.diagnostics.diagnosticsource\4.3.0\lib\netstandard1.3\System.Diagnostics.DiagnosticSource.dll" -a "C:\Users\SaS\.nuget\packages\system.io.filesystem.primitives\4.3.0\lib\netstandard1.3\System.IO.FileSystem.Primitives.dll" -a "C:\Users\SaS\.nuget\packages\system.io.pipelines\4.5.0-preview2-26406-04\lib\netstandard2.0\System.IO.Pipelines.dll" -a "C:\Users\SaS\.nuget\packages\system.linq\4.3.0\lib\netstandard1.6\System.Linq.dll" -a "C:\Users\SaS\.nuget\packages\system.memory\4.5.0-preview2-26406-04\lib\netstandard2.0\System.Memory.dll" -a "C:\Users\SaS\.nuget\packages\system.numerics.vectors\4.5.0-preview2-26406-04\lib\netstandard2.0\System.Numerics.Vectors.dll" -a "C:\Program Files\dotnet\sdk\NuGetFallbackFolder\system.reflection.typeextensions\4.3.0\lib\netstandard1.5\System.Reflection.TypeExtensions.dll" -a "C:\Users\SaS\.nuget\packages\system.runtime.compilerservices.unsafe\4.5.0-preview2-26406-04\lib\netstandard2.0\System.Runtime.CompilerServices.Unsafe.dll" -a "C:\Users\SaS\.nuget\packages\system.runtime.numerics\4.3.0\lib\netstandard1.3\System.Runtime.Numerics.dll" -a "C:\Program Files\dotnet\sdk\NuGetFallbackFolder\system.runtime.serialization.primitives\4.3.0\lib\netstandard1.3\System.Runtime.Serialization.Primitives.dll" -a "C:\Program Files\dotnet\sdk\NuGetFallbackFolder\system.security.claims\4.3.0\lib\netstandard1.3\System.Security.Claims.dll" -a "C:\Program Files\dotnet\sdk\NuGetFallbackFolder\system.security.cryptography.openssl\4.3.0\lib\netstandard1.6\System.Security.Cryptography.OpenSsl.dll" -a "C:\Users\SaS\.nuget\packages\system.security.cryptography.primitives\4.3.0\lib\netstandard1.3\System.Security.Cryptography.Primitives.dll" -a "C:\Program Files\dotnet\sdk\NuGetFallbackFolder\system.security.principal\4.3.0\lib\netstandard1.0\System.Security.Principal.dll" -a "C:\Program Files\dotnet\sdk\NuGetFallbackFolder\system.text.encoding.codepages\4.4.0\lib\netstandard2.0\System.Text.Encoding.CodePages.dll" -a "C:\Users\SaS\.nuget\packages\system.text.encodings.web\4.5.0-preview2-26406-04\lib\netstandard2.0\System.Text.Encodings.Web.dll" -a "C:\Users\SaS\.nuget\packages\system.text.regularexpressions\4.3.0\lib\netstandard1.6\System.Text.RegularExpressions.dll" -a "C:\Users\SaS\.nuget\packages\system.threading\4.3.0\lib\netstandard1.3\System.Threading.dll" -a "C:\Users\SaS\.nuget\packages\system.threading.channels\4.5.0-preview2-26406-04\lib\netstandard2.0\System.Threading.Channels.dll" -a "C:\Users\SaS\.nuget\packages\system.threading.tasks.extensions\4.5.0-preview2-26406-04\lib\netstandard2.0\System.Threading.Tasks.Extensions.dll" -a "C:\Users\SaS\.nuget\packages\system.threading.thread\4.3.0\lib\netstandard1.3\System.Threading.Thread.dll" -a "C:\Program Files\dotnet\sdk\NuGetFallbackFolder\system.threading.threadpool\4.3.0\lib\netstandard1.3\System.Threading.ThreadPool.dll" -a "C:\Users\SaS\.nuget\packages\humanizer.core.de\2.2.0\lib\netstandard1.0\de\Humanizer.resources.dll" -a "c:\temp\WebApplication11\WebApplication11\obj\Debug\netstandard2.0\WebApplication11.dll"" exited with code 1.

[jskeet]

FWIW, I get a similar error installing Noda Time into the project.

Adding the <BlazorLinkOnBuild>false</BlazorLinkOnBuild> build property gets me past it temporarily, at which point I'm getting a TypeInitializationException deep inside Noda Time when it's building a time zone for some reason. I'll need to dig deeper into that...

[alastairtree]

Another very similar error in the linker when you install RestEase into a blazor client side package. The BlazorLinkOnBuild property then allows the build to complete and the underlying issue to surface as a runtime exception:

MonoPlatform.ts:70 Uncaught (in promise) Error: System.TypeInitializationException: The type initializer for 'RestEase.Implementation.ImplementationBuilder' threw an exception. ---> System.PlatformNotSupportedException: Operation is not supported on this platform.
at System.Reflection.Emit.AssemblyBuilder.DefineDynamicAssembly (System.Reflection.AssemblyName name, System.Reflection.Emit.AssemblyBuilderAccess access) <0x204cb50 + 0x0000c> in :0

So no RestEase in blazor for a while.

[chassq]

Related to my comments above about System.Linq.Dynamic.Core. It now seems to work with the latest 0.3.0 release and latest VS Preview.

[MisinformedDNA]

I found that if I have this package:

<PackageReference Include="Microsoft.EntityFrameworkCore.SqlServer" Version="2.0.3" />

the build will fail in VSTS. If I remove the package, it builds fine.

[fileman]

EF sql server pkg is for server side projects

[MisinformedDNA]

Yea, I realized that after I installed it. Locally, the app built fine, with it referenced, but failed once I tried to build in VSTS even though I never used the package. The point is that people need a way to know what is not supported without getting a vague error and banging their head on the door.

[mkArtakMSFT]

@SteveSandersonMS, is there any action from our side here or should this go to the Mono repo?

[SteveSandersonMS]

For anything that fails specifically due to the linker (i.e., works OK if you use <BlazorLinkOnBuild>false</BlazorLinkOnBuild>), then it should be reported to Mono and isn't something we can address in this repo.

[mkArtakMSFT]

This issue was moved to mono/mono#12604