Could not load assembly 'System.Threading.Tasks.Extensions, Version=4.1.1.0

[minaairsupport]

Exception while loading assemblies: System.IO.FileNotFoundException: Could not load assembly 'System.Threading.Tasks.Extensions, Version=4.1.1.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51'. Perhaps it doesn't exist in the Mono for Android profile?

Could any one guide me how to solve this issue I tried to make walk around but it dosent work

..\..\packages\System.Threading.Tasks.Extensions.4.5.1\lib\netstandard2.0\System.Threading.Tasks.Extensions.dll

[ViktorHofer]

When does this happen? As you mention Android it sounds like not when targeting netcoreapp but when building a Xamarin app? The assemblies in the package seem to be correct therefore I assume this issue should be moved over to mono/xamarin.

[minaairsupport]

so what shall I do now , I face this issue from long time , I even try re-create the whole project and insert libraries one by one to check which one cause issue but I can figure may be Microsoft.Azure.Mobile.Client but I am not sure where to start to fix this issue

[ViktorHofer]

You could start by explaining which frameworks you use, what you try to do, the complete scenario so that we can ping people from other related teams that could help. What are you buildling? .NET Framework / .NET Core / Xamarin?

[minaairsupport]

I am building Xamarin project I can't find any of my frameworks that depends on System.Threading.Tasks.Extensions special this version not on nuget
https://www.nuget.org/packages/System.Threading.Tasks.Extensions/

is there any way to delete this library

[karelz]

Were you able to create minimal repro?
It may be best to ask on Xamarin forums. @ericstj does it ring a bell?

@akoeplinger can you please help while @marek-safar is OOF?

[PureWeen]

possibly related

dotnet/reactive#803 (comment)

[ericstj]

We treat System.Threading.Tasks.Extensions as inbox on Xamarin, per @akoeplinger's request: https://github.com/dotnet/corefx/pull/29830/files#diff-589bc4b6d3cf97b763cdd071a726b00bR16

I believe you just need a newer Xamarin SDK to get the Xamarin side of these changes. @akoeplinger which SDK is this? Alternatively you could use an older package before Xamarin asked us to make this change.

[marek-safar]

Tracked as mono/mono#10142

[ViktorHofer]

Closing as this was already tracked and presumably fixed.