Bug 34877 - The "LinkAssemblies" task failed unexpectedly
Summary: The "LinkAssemblies" task failed unexpectedly
Alias: None
Product: Android
Classification: Xamarin
Component: Pre-release ()
Version: 5.1
Hardware: PC Windows
: --- normal
Target Milestone: ---
Assignee: Radek Doulik
Depends on:
Reported: 2015-10-14 15:32 UTC by Mukesh Kumar Mishra
Modified: 2017-06-28 11:48 UTC (History)
7 users (show)

Tags: BZCU
Is this bug a regression?: ---
Last known good build:

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Description Mukesh Kumar Mishra 2015-10-14 15:32:24 UTC
When i am trying to re-build my application in release mode. Xamarin throws below error.

Error	65	The "LinkAssemblies" task failed unexpectedly.
Xamarin.Android.XamarinAndroidException: error XA2006: Reference to metadata item 'System.Runtime.Versioning.FrameworkName' (defined in 'Microsoft.Build.Tasks.v4.0, Version=, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a') from 'Microsoft.Build.Tasks.v4.0, Version=, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' could not be resolved. ---> Mono.Cecil.ResolutionException: Failed to resolve System.Runtime.Versioning.FrameworkName
   at Mono.Linker.Steps.MarkStep.MarkType(TypeReference reference)
   at MonoDroid.Tuner.MonoDroidMarkStep.MarkType(TypeReference reference)
   at Mono.Linker.Steps.MarkStep.MarkField(FieldReference reference)
   at Mono.Linker.Steps.MarkStep.InitializeFields(TypeDefinition type)
   at Mono.Linker.Steps.MarkStep.InitializeType(TypeDefinition type)
   at Mono.Linker.Steps.MarkStep.InitializeAssembly(AssemblyDefinition assembly)
   at Mono.Linker.Steps.MarkStep.Initialize()
   at Mono.Linker.Steps.MarkStep.Process(LinkContext context)
   at Mono.Linker.Pipeline.Process(LinkContext context)
   at MonoDroid.Tuner.Linker.Process(LinkerOptions options, LinkContext& context)
   at Xamarin.Android.Tasks.LinkAssemblies.Execute()
   --- End of inner exception stack trace ---
   at Xamarin.Android.Diagnostic.Error(Int32 code, Exception innerException, String message, Object[] args)
   at Xamarin.Android.Tasks.LinkAssemblies.Execute()
   at Microsoft.Build.BackEnd.TaskExecutionHost.Microsoft.Build.BackEnd.ITaskExecutionHost.Execute()
   at Microsoft.Build.BackEnd.TaskBuilder.<ExecuteInstantiatedTask>d__20.MoveNext()	Tensing.Mojave.MobileApp.Droid
Comment 1 Mukesh Kumar Mishra 2015-10-14 16:30:09 UTC
When i am trying to right click on project and export apk then again visual studio throwing below error:

Unexpected error  Reason: System.IO.FileNotFoundException: Could not load assembly 'Microsoft.Synchronization.ClientServices, Version=, Culture=neutral, PublicKeyToken='. Perhaps it doesn't exist in the Mono for Android profile?
Comment 2 Ashley Gazich [MSFT] 2015-10-15 13:37:53 UTC

When you have an opportunity, would you mind providing the following additional information to help us investigate, please?

1. Reproduction sample
2. Complete build output: Visual Studio: View > Output > Show output from: Build
3. Version information: Visual Studio: Help > About Microsoft Visual Studio > Copy Info [button]

Thank you!
Comment 3 Adam Hartley [MSFT] 2017-06-28 11:48:33 UTC
Because we have not received a reply to our request for more information we are closing this issue. If you are still encountering this issue, please reopen the ticket with the requested information. Thanks!