Xamarin.iOS Can not resolve reference: System.Threading.Tasks.Extensions.dll
I am trying to build a Xamarin.iOS(runtime v4.0.30319) project but keep getting the following error
Severity Code Description Project File Line Suppression State
Error Can not resolve reference: /Library/Frameworks/Xamarin.iOS.framework/Versions/Current/lib/mono/Xamarin.iOS/Facades/System.Threading.Tasks.Extensions.dll myApp.iOS C:Program Files (x86)Microsoft Visual Studio2017ProfessionalMSBuildXamariniOSXamarin.iOS.Common.targets 795
When I look in C:Program Files (x86)Microsoft Visual Studio2017ProfessionalCommon7IDEReferenceAssembliesMicrosoftFrameworkXamarin.iOSv1.0Facades I can see System.Threading.Tasks.Extensions.dll exists.
and when I compare Xamarin.iOS.Common.targets on another machine that works, there are no differences
after extensive searching I have not been able find a solution. I have also tried:
- manually adding the .dll to the iOS project
- reinstalling the .netstandard framework which is used
- deleting the solution and pulling from source control (I'm the only one affected by this issue)
- compared my set up to other working set ups
Extra information (possibly irrelevant): This is a cross platform solution and when built in the android environment, everything works as expected.
xamarin.ios
asked Nov 22 '18 at 12:22
tony09uktony09uk
1,03332441
add a comment |
I am trying to build a Xamarin.iOS(runtime v4.0.30319) project but keep getting the following error
Severity Code Description Project File Line Suppression State
Error Can not resolve reference: /Library/Frameworks/Xamarin.iOS.framework/Versions/Current/lib/mono/Xamarin.iOS/Facades/System.Threading.Tasks.Extensions.dll myApp.iOS C:Program Files (x86)Microsoft Visual Studio2017ProfessionalMSBuildXamariniOSXamarin.iOS.Common.targets 795
When I look in C:Program Files (x86)Microsoft Visual Studio2017ProfessionalCommon7IDEReferenceAssembliesMicrosoftFrameworkXamarin.iOSv1.0Facades I can see System.Threading.Tasks.Extensions.dll exists.
and when I compare Xamarin.iOS.Common.targets on another machine that works, there are no differences
after extensive searching I have not been able find a solution. I have also tried:
- manually adding the .dll to the iOS project
- reinstalling the .netstandard framework which is used
- deleting the solution and pulling from source control (I'm the only one affected by this issue)
- compared my set up to other working set ups
Extra information (possibly irrelevant): This is a cross platform solution and when built in the android environment, everything works as expected.
xamarin.ios
asked Nov 22 '18 at 12:22
tony09uktony09uk
1,03332441
Because this error is provocated by many types of error or inconsistencies try all this steps, 1) delete de bin/obj folder in your project 2) delete the app of the simulator 3) change the simulator device, 4) close visual studio, 5) open again, 6)restore the nuget packages 7) clean and rebuild let me know if this solved your problem.
– Marcos José Pérez Pérez
Nov 22 '18 at 19:03
add a comment |
I am trying to build a Xamarin.iOS(runtime v4.0.30319) project but keep getting the following error
Severity Code Description Project File Line Suppression State
Error Can not resolve reference: /Library/Frameworks/Xamarin.iOS.framework/Versions/Current/lib/mono/Xamarin.iOS/Facades/System.Threading.Tasks.Extensions.dll myApp.iOS C:Program Files (x86)Microsoft Visual Studio2017ProfessionalMSBuildXamariniOSXamarin.iOS.Common.targets 795
When I look in C:Program Files (x86)Microsoft Visual Studio2017ProfessionalCommon7IDEReferenceAssembliesMicrosoftFrameworkXamarin.iOSv1.0Facades I can see System.Threading.Tasks.Extensions.dll exists.
and when I compare Xamarin.iOS.Common.targets on another machine that works, there are no differences
after extensive searching I have not been able find a solution. I have also tried:
- manually adding the .dll to the iOS project
- reinstalling the .netstandard framework which is used
- deleting the solution and pulling from source control (I'm the only one affected by this issue)
- compared my set up to other working set ups
Extra information (possibly irrelevant): This is a cross platform solution and when built in the android environment, everything works as expected.
xamarin.ios
asked Nov 22 '18 at 12:22
tony09uktony09uk
1,03332441
I am trying to build a Xamarin.iOS(runtime v4.0.30319) project but keep getting the following error
Severity Code Description Project File Line Suppression State
Error Can not resolve reference: /Library/Frameworks/Xamarin.iOS.framework/Versions/Current/lib/mono/Xamarin.iOS/Facades/System.Threading.Tasks.Extensions.dll myApp.iOS C:Program Files (x86)Microsoft Visual Studio2017ProfessionalMSBuildXamariniOSXamarin.iOS.Common.targets 795
When I look in C:Program Files (x86)Microsoft Visual Studio2017ProfessionalCommon7IDEReferenceAssembliesMicrosoftFrameworkXamarin.iOSv1.0Facades I can see System.Threading.Tasks.Extensions.dll exists.
and when I compare Xamarin.iOS.Common.targets on another machine that works, there are no differences
after extensive searching I have not been able find a solution. I have also tried:
- manually adding the .dll to the iOS project
- reinstalling the .netstandard framework which is used
- deleting the solution and pulling from source control (I'm the only one affected by this issue)
- compared my set up to other working set ups
Extra information (possibly irrelevant): This is a cross platform solution and when built in the android environment, everything works as expected.
xamarin.ios
xamarin.ios
asked Nov 22 '18 at 12:22
tony09uktony09uk
1,03332441
asked Nov 22 '18 at 12:22
tony09uktony09uk
1,03332441
asked Nov 22 '18 at 12:22
tony09uktony09uk
1,03332441
asked Nov 22 '18 at 12:22
tony09uktony09uk
1,03332441
asked Nov 22 '18 at 12:22
tony09uktony09uk
1,03332441
1,03332441
Because this error is provocated by many types of error or inconsistencies try all this steps, 1) delete de bin/obj folder in your project 2) delete the app of the simulator 3) change the simulator device, 4) close visual studio, 5) open again, 6)restore the nuget packages 7) clean and rebuild let me know if this solved your problem.
– Marcos José Pérez Pérez
Nov 22 '18 at 19:03
add a comment |
Because this error is provocated by many types of error or inconsistencies try all this steps, 1) delete de bin/obj folder in your project 2) delete the app of the simulator 3) change the simulator device, 4) close visual studio, 5) open again, 6)restore the nuget packages 7) clean and rebuild let me know if this solved your problem.
– Marcos José Pérez Pérez
Nov 22 '18 at 19:03
Because this error is provocated by many types of error or inconsistencies try all this steps, 1) delete de bin/obj folder in your project 2) delete the app of the simulator 3) change the simulator device, 4) close visual studio, 5) open again, 6)restore the nuget packages 7) clean and rebuild let me know if this solved your problem.
– Marcos José Pérez Pérez
Nov 22 '18 at 19:03
Because this error is provocated by many types of error or inconsistencies try all this steps, 1) delete de bin/obj folder in your project 2) delete the app of the simulator 3) change the simulator device, 4) close visual studio, 5) open again, 6)restore the nuget packages 7) clean and rebuild let me know if this solved your problem.
– Marcos José Pérez Pérez
Nov 22 '18 at 19:03
add a comment |
3 Answers
3
active
oldest
votes
I too had a similar problem but there was no System.Threading.Tasks.Extensions.dll on the Mac in the /Library/Frameworks/Xamarin.iOS.framework/Versions/Current/lib/mono/Xamarin.iOS/Facades folder. However on the Windows PC, this file exists in the C:Program Files (x86)Microsoft Visual Studio2017CommunityCommon7IDEReferenceAssembliesMicrosoftFrameworkXamarin.iOSv1.0Facades folder.
The solution for me was to copy the System.Threading.Tasks.Extensions.dll file from the Windows PC to the Mac.
answered Dec 10 '18 at 5:06
Mike GMike G
434
That file should be created on build. You may have a versioning problem too
– tony09uk
Dec 10 '18 at 10:09
How do you correct a versioning problem? Using the pair-to-Mac feature of VS, the only thing I do is keep the Mac XCode updated, and I'm running the current release of VS 2017 on the Windows PC.
– Mike G
Dec 11 '18 at 4:35
add a comment |
I ran into this issue as well. My solution was to launch Visual Studio on the Mac (in my case a Mac Mini) and grab all updates for Visual Studio. One of the updates specifically mentioned the System.Threading.Tasks.Extensions.dll issue that I had been experiencing. After the updates I was able to build the project.
Release note of Visual Studio 15.9.4 :
"Error MT2002: Failed to resolve 'System.Runtime.CompilerServices.AsyncValueTaskMethodBuilder' reference from 'System.Threading.Tasks.Extensions...'" when building a Xamarin.iOS project."
https://docs.microsoft.com/fr-fr/visualstudio/releasenotes/vs2017-relnotes#-visual-studio-2017-version-1594visual-studio-2017-version-1594-
edited Dec 13 '18 at 16:06
Erzékiel
1,49441736
answered Dec 11 '18 at 21:13
DexterDexter
211
add a comment |
This issue was caused by a versioning mismatch.
I was running developing in on my windows machine and deploying to an iOS device via a mac on my local network.
The iOS version held on the mac differed from the version in my xamarin iOS project (the mac had been updated by another dev).
The resolution for me was to make sure both versions were the same
answered Dec 7 '18 at 13:33
tony09uktony09uk
1,03332441
add a comment |
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3 Answers
3
active
oldest
votes
3 Answers
3
active
oldest
votes
active
oldest
votes
active
oldest
votes
I too had a similar problem but there was no System.Threading.Tasks.Extensions.dll on the Mac in the /Library/Frameworks/Xamarin.iOS.framework/Versions/Current/lib/mono/Xamarin.iOS/Facades folder. However on the Windows PC, this file exists in the C:Program Files (x86)Microsoft Visual Studio2017CommunityCommon7IDEReferenceAssembliesMicrosoftFrameworkXamarin.iOSv1.0Facades folder.
The solution for me was to copy the System.Threading.Tasks.Extensions.dll file from the Windows PC to the Mac.
answered Dec 10 '18 at 5:06
Mike GMike G
434
That file should be created on build. You may have a versioning problem too
– tony09uk
Dec 10 '18 at 10:09
How do you correct a versioning problem? Using the pair-to-Mac feature of VS, the only thing I do is keep the Mac XCode updated, and I'm running the current release of VS 2017 on the Windows PC.
– Mike G
Dec 11 '18 at 4:35
add a comment |
I too had a similar problem but there was no System.Threading.Tasks.Extensions.dll on the Mac in the /Library/Frameworks/Xamarin.iOS.framework/Versions/Current/lib/mono/Xamarin.iOS/Facades folder. However on the Windows PC, this file exists in the C:Program Files (x86)Microsoft Visual Studio2017CommunityCommon7IDEReferenceAssembliesMicrosoftFrameworkXamarin.iOSv1.0Facades folder.
The solution for me was to copy the System.Threading.Tasks.Extensions.dll file from the Windows PC to the Mac.
answered Dec 10 '18 at 5:06
Mike GMike G
434
That file should be created on build. You may have a versioning problem too
– tony09uk
Dec 10 '18 at 10:09
How do you correct a versioning problem? Using the pair-to-Mac feature of VS, the only thing I do is keep the Mac XCode updated, and I'm running the current release of VS 2017 on the Windows PC.
– Mike G
Dec 11 '18 at 4:35
add a comment |
I too had a similar problem but there was no System.Threading.Tasks.Extensions.dll on the Mac in the /Library/Frameworks/Xamarin.iOS.framework/Versions/Current/lib/mono/Xamarin.iOS/Facades folder. However on the Windows PC, this file exists in the C:Program Files (x86)Microsoft Visual Studio2017CommunityCommon7IDEReferenceAssembliesMicrosoftFrameworkXamarin.iOSv1.0Facades folder.
The solution for me was to copy the System.Threading.Tasks.Extensions.dll file from the Windows PC to the Mac.
answered Dec 10 '18 at 5:06
Mike GMike G
434
I too had a similar problem but there was no System.Threading.Tasks.Extensions.dll on the Mac in the /Library/Frameworks/Xamarin.iOS.framework/Versions/Current/lib/mono/Xamarin.iOS/Facades folder. However on the Windows PC, this file exists in the C:Program Files (x86)Microsoft Visual Studio2017CommunityCommon7IDEReferenceAssembliesMicrosoftFrameworkXamarin.iOSv1.0Facades folder.
The solution for me was to copy the System.Threading.Tasks.Extensions.dll file from the Windows PC to the Mac.
answered Dec 10 '18 at 5:06
Mike GMike G
434
answered Dec 10 '18 at 5:06
Mike GMike G
434
answered Dec 10 '18 at 5:06
Mike GMike G
434
answered Dec 10 '18 at 5:06
Mike GMike G
434
434
That file should be created on build. You may have a versioning problem too
– tony09uk
Dec 10 '18 at 10:09
How do you correct a versioning problem? Using the pair-to-Mac feature of VS, the only thing I do is keep the Mac XCode updated, and I'm running the current release of VS 2017 on the Windows PC.
– Mike G
Dec 11 '18 at 4:35
add a comment |
That file should be created on build. You may have a versioning problem too
– tony09uk
Dec 10 '18 at 10:09
How do you correct a versioning problem? Using the pair-to-Mac feature of VS, the only thing I do is keep the Mac XCode updated, and I'm running the current release of VS 2017 on the Windows PC.
– Mike G
Dec 11 '18 at 4:35
That file should be created on build. You may have a versioning problem too
– tony09uk
Dec 10 '18 at 10:09
That file should be created on build. You may have a versioning problem too
– tony09uk
Dec 10 '18 at 10:09
How do you correct a versioning problem? Using the pair-to-Mac feature of VS, the only thing I do is keep the Mac XCode updated, and I'm running the current release of VS 2017 on the Windows PC.
– Mike G
Dec 11 '18 at 4:35
How do you correct a versioning problem? Using the pair-to-Mac feature of VS, the only thing I do is keep the Mac XCode updated, and I'm running the current release of VS 2017 on the Windows PC.
– Mike G
Dec 11 '18 at 4:35
add a comment |
I ran into this issue as well. My solution was to launch Visual Studio on the Mac (in my case a Mac Mini) and grab all updates for Visual Studio. One of the updates specifically mentioned the System.Threading.Tasks.Extensions.dll issue that I had been experiencing. After the updates I was able to build the project.
Release note of Visual Studio 15.9.4 :
"Error MT2002: Failed to resolve 'System.Runtime.CompilerServices.AsyncValueTaskMethodBuilder' reference from 'System.Threading.Tasks.Extensions...'" when building a Xamarin.iOS project."
https://docs.microsoft.com/fr-fr/visualstudio/releasenotes/vs2017-relnotes#-visual-studio-2017-version-1594visual-studio-2017-version-1594-
edited Dec 13 '18 at 16:06
Erzékiel
1,49441736
answered Dec 11 '18 at 21:13
DexterDexter
211
add a comment |
I ran into this issue as well. My solution was to launch Visual Studio on the Mac (in my case a Mac Mini) and grab all updates for Visual Studio. One of the updates specifically mentioned the System.Threading.Tasks.Extensions.dll issue that I had been experiencing. After the updates I was able to build the project.
Release note of Visual Studio 15.9.4 :
"Error MT2002: Failed to resolve 'System.Runtime.CompilerServices.AsyncValueTaskMethodBuilder' reference from 'System.Threading.Tasks.Extensions...'" when building a Xamarin.iOS project."
https://docs.microsoft.com/fr-fr/visualstudio/releasenotes/vs2017-relnotes#-visual-studio-2017-version-1594visual-studio-2017-version-1594-
edited Dec 13 '18 at 16:06
Erzékiel
1,49441736
answered Dec 11 '18 at 21:13
DexterDexter
211
add a comment |
I ran into this issue as well. My solution was to launch Visual Studio on the Mac (in my case a Mac Mini) and grab all updates for Visual Studio. One of the updates specifically mentioned the System.Threading.Tasks.Extensions.dll issue that I had been experiencing. After the updates I was able to build the project.
Release note of Visual Studio 15.9.4 :
"Error MT2002: Failed to resolve 'System.Runtime.CompilerServices.AsyncValueTaskMethodBuilder' reference from 'System.Threading.Tasks.Extensions...'" when building a Xamarin.iOS project."
https://docs.microsoft.com/fr-fr/visualstudio/releasenotes/vs2017-relnotes#-visual-studio-2017-version-1594visual-studio-2017-version-1594-
edited Dec 13 '18 at 16:06
Erzékiel
1,49441736
answered Dec 11 '18 at 21:13
DexterDexter
211
I ran into this issue as well. My solution was to launch Visual Studio on the Mac (in my case a Mac Mini) and grab all updates for Visual Studio. One of the updates specifically mentioned the System.Threading.Tasks.Extensions.dll issue that I had been experiencing. After the updates I was able to build the project.
Release note of Visual Studio 15.9.4 :
"Error MT2002: Failed to resolve 'System.Runtime.CompilerServices.AsyncValueTaskMethodBuilder' reference from 'System.Threading.Tasks.Extensions...'" when building a Xamarin.iOS project."
https://docs.microsoft.com/fr-fr/visualstudio/releasenotes/vs2017-relnotes#-visual-studio-2017-version-1594visual-studio-2017-version-1594-
edited Dec 13 '18 at 16:06
Erzékiel
1,49441736
answered Dec 11 '18 at 21:13
DexterDexter
211
edited Dec 13 '18 at 16:06
Erzékiel
1,49441736
edited Dec 13 '18 at 16:06
Erzékiel
1,49441736
edited Dec 13 '18 at 16:06
Erzékiel
1,49441736
1,49441736
answered Dec 11 '18 at 21:13
DexterDexter
211
answered Dec 11 '18 at 21:13
DexterDexter
211
answered Dec 11 '18 at 21:13
DexterDexter
211
211
add a comment |
add a comment |
This issue was caused by a versioning mismatch.
I was running developing in on my windows machine and deploying to an iOS device via a mac on my local network.
The iOS version held on the mac differed from the version in my xamarin iOS project (the mac had been updated by another dev).
The resolution for me was to make sure both versions were the same
answered Dec 7 '18 at 13:33
tony09uktony09uk
1,03332441
add a comment |
This issue was caused by a versioning mismatch.
I was running developing in on my windows machine and deploying to an iOS device via a mac on my local network.
The iOS version held on the mac differed from the version in my xamarin iOS project (the mac had been updated by another dev).
The resolution for me was to make sure both versions were the same
answered Dec 7 '18 at 13:33
tony09uktony09uk
1,03332441
add a comment |
This issue was caused by a versioning mismatch.
I was running developing in on my windows machine and deploying to an iOS device via a mac on my local network.
The iOS version held on the mac differed from the version in my xamarin iOS project (the mac had been updated by another dev).
The resolution for me was to make sure both versions were the same
answered Dec 7 '18 at 13:33
tony09uktony09uk
1,03332441
This issue was caused by a versioning mismatch.
I was running developing in on my windows machine and deploying to an iOS device via a mac on my local network.
The iOS version held on the mac differed from the version in my xamarin iOS project (the mac had been updated by another dev).
The resolution for me was to make sure both versions were the same
answered Dec 7 '18 at 13:33
tony09uktony09uk
1,03332441
answered Dec 7 '18 at 13:33
tony09uktony09uk
1,03332441
answered Dec 7 '18 at 13:33
tony09uktony09uk
1,03332441
answered Dec 7 '18 at 13:33
tony09uktony09uk
1,03332441
1,03332441
add a comment |
add a comment |
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Because this error is provocated by many types of error or inconsistencies try all this steps, 1) delete de bin/obj folder in your project 2) delete the app of the simulator 3) change the simulator device, 4) close visual studio, 5) open again, 6)restore the nuget packages 7) clean and rebuild let me know if this solved your problem.
– Marcos José Pérez Pérez
Nov 22 '18 at 19:03