Can something be done about the Microsoft.Tpl.Dataflow package?

[svick]

The Microsoft.Tpl.Dataflow package is outdated and generally shouldn't be used anymore. The replacement is the System.Threading.Tasks.Dataflow package.

But people keep using the old package (see e.g. https://github.com/dotnet/corefx/issues/202#issuecomment-335470737), not knowing they should switch to the new one. Is there something that can be done to help those people?

Some options I considered:

1. Add an analyzer to dotnet/platform-compat that will consider Microsoft.Tpl.Dataflow deprecated.
2. Release a new version of Microsoft.Tpl.Dataflow that will contain no code of its own and will "redirect" to System.Threading.Tasks.Dataflow by having a dependency on it. (And then keep releasing a new version every time System.Threading.Tasks.Dataflow updates?)

cc: @stephentoub

[akoeplinger]

IMO we should pick option 2 and then unlist the Microsoft.Tpl.Dataflow package so it doesn't show in search results.

[jmazouri]

I just had someone ask me a question about this and wasn't sure of the answer, so I had to look into it and found this issue.

Keeping both listed can cause confusion for those unaware of the difference - especially when Visual Studio's package manager lists the "incorrect" one first, with the proper one being quite far down the list:

[danmoseley]

@weshaggard can't we just unlist (not delete) the package?

[weshaggard]

I just unlisted all the versions so that should help with the confusion.

[HowardvanRooijen]

Except I now can't install Microsoft.Azure.WebJobs.Extensions 2.2.2 because it has a direct dependency on Microsoft.Tpl.Dataflow :(

[weshaggard]

@HowardvanRooijen how are you installing? By unlisting the package it should still be install-able when there are references to exact versions.

[tfritzke]

My project is using Microsoft.AspNet.WebHooks.Custom.Mvc, which has a dependency on Microsoft.AspNet.WebHooks.Custom which, in turn, has a dependency on Microsoft.Tpl.Dataflow (>= 4.5.24)

Running this command in the Package Manager Console now generates an error:

Update-Package -Reinstall

Update-Package : Unable to find package 'Microsoft.Tpl.Dataflow'. Existing packages must be restored before performing an install or update.At
line:1 char:1

• Update-Package -Reinstall -IgnoreDependencies

•   + CategoryInfo          : NotSpecified: (:) [Update-Package], Exception
    + FullyQualifiedErrorId : NuGetCmdletUnhandledException,NuGet.PackageManagement.PowerShellCmdlets.UpdatePackageCommand
  
  

The packages directory for the solution does have a local copy Microsoft.Tpl.Dataflow.4.5.24.

[HowardvanRooijen]

^^ Exactly the same for me both locally and on our VSTS hosted VS2017 build agent.

[weshaggard]

@tfritzke @HowardvanRooijen are you doing it from the VS "Package Manager Console".

It seems to work for me locally:

PM> Install-package Microsoft.AspNet.WebHooks.Custom.Mvc
Attempting to gather dependency information for package 'Microsoft.AspNet.WebHooks.Custom.Mvc.1.2.1' with respect to project 'ConsoleApp2', targeting '.NETFramework,Version=v4.6.1'
Gathering dependency information took 20.6 sec
Attempting to resolve dependencies for package 'Microsoft.AspNet.WebHooks.Custom.Mvc.1.2.1' with DependencyBehavior 'Lowest'
Resolving dependency information took 0 ms
Resolving actions to install package 'Microsoft.AspNet.WebHooks.Custom.Mvc.1.2.1'
Resolved actions to install package 'Microsoft.AspNet.WebHooks.Custom.Mvc.1.2.1'
  GET https://api.nuget.org/v3-flatcontainer/microsoft.tpl.dataflow/4.5.24/microsoft.tpl.dataflow.4.5.24.nupkg
  GET https://api.nuget.org/v3-flatcontainer/microsoft.aspnet.webpages/3.2.2/microsoft.aspnet.webpages.3.2.2.nupkg
  GET https://api.nuget.org/v3-flatcontainer/microsoft.web.infrastructure/1.0.0/microsoft.web.infrastructure.1.0.0.nupkg
  GET https://api.nuget.org/v3-flatcontainer/microsoft.aspnet.webapi.core/5.2.2/microsoft.aspnet.webapi.core.5.2.2.nupkg
  GET https://api.nuget.org/v3-flatcontainer/microsoft.aspnet.razor/3.2.2/microsoft.aspnet.razor.3.2.2.nupkg
  GET https://api.nuget.org/v3-flatcontainer/microsoft.aspnet.mvc/5.2.2/microsoft.aspnet.mvc.5.2.2.nupkg
  GET https://api.nuget.org/v3-flatcontainer/newtonsoft.json/6.0.4/newtonsoft.json.6.0.4.nupkg
  GET https://api.nuget.org/v3-flatcontainer/microsoft.aspnet.webapi.client/5.2.2/microsoft.aspnet.webapi.client.5.2.2.nupkg
  OK https://api.nuget.org/v3-flatcontainer/microsoft.web.infrastructure/1.0.0/microsoft.web.infrastructure.1.0.0.nupkg 5ms
Installing Microsoft.Web.Infrastructure 1.0.0.
  GET https://api.nuget.org/v3-flatcontainer/microsoft.aspnet.webhooks.common/1.2.1/microsoft.aspnet.webhooks.common.1.2.1.nupkg
  OK https://api.nuget.org/v3-flatcontainer/microsoft.aspnet.mvc/5.2.2/microsoft.aspnet.mvc.5.2.2.nupkg 241ms
Installing Microsoft.AspNet.Mvc 5.2.2.
  OK https://api.nuget.org/v3-flatcontainer/microsoft.aspnet.razor/3.2.2/microsoft.aspnet.razor.3.2.2.nupkg 262ms
Installing Microsoft.AspNet.Razor 3.2.2.
  GET https://api.nuget.org/v3-flatcontainer/microsoft.aspnet.webhooks.custom/1.2.1/microsoft.aspnet.webhooks.custom.1.2.1.nupkg
  GET https://api.nuget.org/v3-flatcontainer/microsoft.aspnet.webhooks.custom.mvc/1.2.1/microsoft.aspnet.webhooks.custom.mvc.1.2.1.nupkg
Retrieving package 'Microsoft.AspNet.Mvc 5.2.2' from 'nuget.org'.
Retrieving package 'Microsoft.AspNet.Razor 3.2.2' from 'nuget.org'.
Retrieving package 'Microsoft.AspNet.WebApi.Client 5.2.2' from 'nuget.org'.
Retrieving package 'Microsoft.AspNet.WebApi.Core 5.2.2' from 'nuget.org'.
Retrieving package 'Microsoft.AspNet.WebHooks.Common 1.2.1' from 'nuget.org'.
Retrieving package 'Microsoft.AspNet.WebHooks.Custom 1.2.1' from 'nuget.org'.
Retrieving package 'Microsoft.AspNet.WebHooks.Custom.Mvc 1.2.1' from 'nuget.org'.
Retrieving package 'Microsoft.AspNet.WebPages 3.2.2' from 'nuget.org'.
Retrieving package 'Microsoft.Tpl.Dataflow 4.5.24' from 'nuget.org'.
Retrieving package 'Microsoft.Web.Infrastructure 1.0.0' from 'nuget.org'.
Retrieving package 'Newtonsoft.Json 6.0.4' from 'nuget.org'.
  OK https://api.nuget.org/v3-flatcontainer/microsoft.aspnet.webapi.core/5.2.2/microsoft.aspnet.webapi.core.5.2.2.nupkg 518ms
Installing Microsoft.AspNet.WebApi.Core 5.2.2.
  OK https://api.nuget.org/v3-flatcontainer/microsoft.aspnet.webpages/3.2.2/microsoft.aspnet.webpages.3.2.2.nupkg 520ms
Installing Microsoft.AspNet.WebPages 3.2.2.
Adding package 'Microsoft.AspNet.Razor.3.2.2' to folder 'C:\Users\wesh\source\repos\ConsoleApp2\packages'
  OK https://api.nuget.org/v3-flatcontainer/microsoft.tpl.dataflow/4.5.24/microsoft.tpl.dataflow.4.5.24.nupkg 533ms
Installing Microsoft.Tpl.Dataflow 4.5.24.
  OK https://api.nuget.org/v3-flatcontainer/newtonsoft.json/6.0.4/newtonsoft.json.6.0.4.nupkg 530ms
Installing Newtonsoft.Json 6.0.4.
  OK https://api.nuget.org/v3-flatcontainer/microsoft.aspnet.webapi.client/5.2.2/microsoft.aspnet.webapi.client.5.2.2.nupkg 613ms
Installing Microsoft.AspNet.WebApi.Client 5.2.2.
Added package 'Microsoft.AspNet.Razor.3.2.2' to folder 'C:\Users\wesh\source\repos\ConsoleApp2\packages'
  OK https://api.nuget.org/v3-flatcontainer/microsoft.aspnet.webhooks.common/1.2.1/microsoft.aspnet.webhooks.common.1.2.1.nupkg 747ms
Installing Microsoft.AspNet.WebHooks.Common 1.2.1.
Added package 'Microsoft.AspNet.Razor.3.2.2' to 'packages.config'
  OK https://api.nuget.org/v3-flatcontainer/microsoft.aspnet.webhooks.custom.mvc/1.2.1/microsoft.aspnet.webhooks.custom.mvc.1.2.1.nupkg 501ms
Installing Microsoft.AspNet.WebHooks.Custom.Mvc 1.2.1.
  OK https://api.nuget.org/v3-flatcontainer/microsoft.aspnet.webhooks.custom/1.2.1/microsoft.aspnet.webhooks.custom.1.2.1.nupkg 545ms
Installing Microsoft.AspNet.WebHooks.Custom 1.2.1.
Successfully installed 'Microsoft.AspNet.Razor 3.2.2' to ConsoleApp2
Adding package 'Microsoft.Tpl.Dataflow.4.5.24' to folder 'C:\Users\wesh\source\repos\ConsoleApp2\packages'
Added package 'Microsoft.Tpl.Dataflow.4.5.24' to folder 'C:\Users\wesh\source\repos\ConsoleApp2\packages'
Added package 'Microsoft.Tpl.Dataflow.4.5.24' to 'packages.config'
Successfully installed 'Microsoft.Tpl.Dataflow 4.5.24' to ConsoleApp2
Adding package 'Microsoft.Web.Infrastructure.1.0.0' to folder 'C:\Users\wesh\source\repos\ConsoleApp2\packages'
Added package 'Microsoft.Web.Infrastructure.1.0.0' to folder 'C:\Users\wesh\source\repos\ConsoleApp2\packages'
Added package 'Microsoft.Web.Infrastructure.1.0.0' to 'packages.config'
Successfully installed 'Microsoft.Web.Infrastructure 1.0.0' to ConsoleApp2
Adding package 'Microsoft.AspNet.WebPages.3.2.2' to folder 'C:\Users\wesh\source\repos\ConsoleApp2\packages'
Added package 'Microsoft.AspNet.WebPages.3.2.2' to folder 'C:\Users\wesh\source\repos\ConsoleApp2\packages'
Added package 'Microsoft.AspNet.WebPages.3.2.2' to 'packages.config'
Successfully installed 'Microsoft.AspNet.WebPages 3.2.2' to ConsoleApp2
Adding package 'Microsoft.AspNet.Mvc.5.2.2' to folder 'C:\Users\wesh\source\repos\ConsoleApp2\packages'
Added package 'Microsoft.AspNet.Mvc.5.2.2' to folder 'C:\Users\wesh\source\repos\ConsoleApp2\packages'
Added package 'Microsoft.AspNet.Mvc.5.2.2' to 'packages.config'
Successfully installed 'Microsoft.AspNet.Mvc 5.2.2' to ConsoleApp2
Adding package 'Newtonsoft.Json.6.0.4' to folder 'C:\Users\wesh\source\repos\ConsoleApp2\packages'
Added package 'Newtonsoft.Json.6.0.4' to folder 'C:\Users\wesh\source\repos\ConsoleApp2\packages'
Added package 'Newtonsoft.Json.6.0.4' to 'packages.config'
Executing script file 'C:\Users\wesh\source\repos\ConsoleApp2\packages\Newtonsoft.Json.6.0.4\tools\install.ps1'
Successfully installed 'Newtonsoft.Json 6.0.4' to ConsoleApp2
Adding package 'Microsoft.AspNet.WebApi.Client.5.2.2' to folder 'C:\Users\wesh\source\repos\ConsoleApp2\packages'
Added package 'Microsoft.AspNet.WebApi.Client.5.2.2' to folder 'C:\Users\wesh\source\repos\ConsoleApp2\packages'
Added package 'Microsoft.AspNet.WebApi.Client.5.2.2' to 'packages.config'
Successfully installed 'Microsoft.AspNet.WebApi.Client 5.2.2' to ConsoleApp2
Adding package 'Microsoft.AspNet.WebApi.Core.5.2.2' to folder 'C:\Users\wesh\source\repos\ConsoleApp2\packages'
Added package 'Microsoft.AspNet.WebApi.Core.5.2.2' to folder 'C:\Users\wesh\source\repos\ConsoleApp2\packages'
Added package 'Microsoft.AspNet.WebApi.Core.5.2.2' to 'packages.config'
Successfully installed 'Microsoft.AspNet.WebApi.Core 5.2.2' to ConsoleApp2
Adding package 'Microsoft.AspNet.WebHooks.Common.1.2.1' to folder 'C:\Users\wesh\source\repos\ConsoleApp2\packages'
Added package 'Microsoft.AspNet.WebHooks.Common.1.2.1' to folder 'C:\Users\wesh\source\repos\ConsoleApp2\packages'
Added package 'Microsoft.AspNet.WebHooks.Common.1.2.1' to 'packages.config'
Successfully installed 'Microsoft.AspNet.WebHooks.Common 1.2.1' to ConsoleApp2
Adding package 'Microsoft.AspNet.WebHooks.Custom.1.2.1' to folder 'C:\Users\wesh\source\repos\ConsoleApp2\packages'
Added package 'Microsoft.AspNet.WebHooks.Custom.1.2.1' to folder 'C:\Users\wesh\source\repos\ConsoleApp2\packages'
Added package 'Microsoft.AspNet.WebHooks.Custom.1.2.1' to 'packages.config'
Successfully installed 'Microsoft.AspNet.WebHooks.Custom 1.2.1' to ConsoleApp2
Adding package 'Microsoft.AspNet.WebHooks.Custom.Mvc.1.2.1' to folder 'C:\Users\wesh\source\repos\ConsoleApp2\packages'
Added package 'Microsoft.AspNet.WebHooks.Custom.Mvc.1.2.1' to folder 'C:\Users\wesh\source\repos\ConsoleApp2\packages'
Added package 'Microsoft.AspNet.WebHooks.Custom.Mvc.1.2.1' to 'packages.config'
Successfully installed 'Microsoft.AspNet.WebHooks.Custom.Mvc 1.2.1' to ConsoleApp2
Executing nuget actions took 3.79 sec
Time Elapsed: 00:00:25.2066344
PM> Update-package Microsoft.AspNet.WebHooks.Custom.Mvc


Attempting to gather dependency information for multiple packages with respect to project 'ConsoleApp2', targeting '.NETFramework,Version=v4.6.1'
Gathering dependency information took 22.8 sec
Attempting to resolve dependencies for multiple packages.
Resolving dependency information took 0 ms
Resolving actions install multiple packages
Resolution was successful but resulted in no action
There are no new updates available.
No package updates are available from the current package source for project 'ConsoleApp2'.
Executing nuget actions took 210.23 ms
Time Elapsed: 00:00:23.1770654
PM> 

cc @rrelyea

[tfritzke]

@weshaggard What's your result when running the command "Update-Package -Reinstall"?

[weshaggard]

Same.

PM> Update-package -reinstall Microsoft.AspNet.WebHooks.Custom.Mvc


Attempting to gather dependency information for multiple packages with respect to project 'ConsoleApp2', targeting '.NETFramework,Version=v4.6.1'
Gathering dependency information took 21.2 sec
Attempting to resolve dependencies for multiple packages.
Resolving dependency information took 0 ms
Resolving actions install multiple packages
Retrieving package 'Microsoft.AspNet.Mvc 5.2.2' from 'C:\Users\wesh\source\repos\ConsoleApp2\packages'.
Retrieving package 'Microsoft.AspNet.Razor 3.2.2' from 'C:\Users\wesh\source\repos\ConsoleApp2\packages'.
Retrieving package 'Microsoft.AspNet.WebApi.Client 5.2.2' from 'C:\Users\wesh\source\repos\ConsoleApp2\packages'.
Retrieving package 'Microsoft.AspNet.WebApi.Core 5.2.2' from 'C:\Users\wesh\source\repos\ConsoleApp2\packages'.
Retrieving package 'Microsoft.AspNet.WebHooks.Common 1.2.1' from 'C:\Users\wesh\source\repos\ConsoleApp2\packages'.
Retrieving package 'Microsoft.AspNet.WebHooks.Custom 1.2.1' from 'C:\Users\wesh\source\repos\ConsoleApp2\packages'.
Retrieving package 'Microsoft.AspNet.WebHooks.Custom.Mvc 1.2.1' from 'nuget.org'.
Retrieving package 'Microsoft.AspNet.WebPages 3.2.2' from 'C:\Users\wesh\source\repos\ConsoleApp2\packages'.
Retrieving package 'Microsoft.Tpl.Dataflow 4.5.24' from 'C:\Users\wesh\source\repos\ConsoleApp2\packages'.
Retrieving package 'Microsoft.Web.Infrastructure 1.0.0' from 'C:\Users\wesh\source\repos\ConsoleApp2\packages'.
Retrieving package 'Newtonsoft.Json 6.0.4' from 'C:\Users\wesh\source\repos\ConsoleApp2\packages'.
Removed package 'Microsoft.AspNet.WebHooks.Custom.Mvc 1.2.1' from 'packages.config'
Successfully uninstalled 'Microsoft.AspNet.WebHooks.Custom.Mvc 1.2.1' from ConsoleApp2
Removed package 'Microsoft.AspNet.WebHooks.Custom 1.2.1' from 'packages.config'
Successfully uninstalled 'Microsoft.AspNet.WebHooks.Custom 1.2.1' from ConsoleApp2
Removed package 'Microsoft.AspNet.WebHooks.Common 1.2.1' from 'packages.config'
Successfully uninstalled 'Microsoft.AspNet.WebHooks.Common 1.2.1' from ConsoleApp2
Removed package 'Microsoft.AspNet.WebApi.Core 5.2.2' from 'packages.config'
Successfully uninstalled 'Microsoft.AspNet.WebApi.Core 5.2.2' from ConsoleApp2
Removed package 'Microsoft.AspNet.WebApi.Client 5.2.2' from 'packages.config'
Successfully uninstalled 'Microsoft.AspNet.WebApi.Client 5.2.2' from ConsoleApp2
Removed package 'Newtonsoft.Json 6.0.4' from 'packages.config'
Successfully uninstalled 'Newtonsoft.Json 6.0.4' from ConsoleApp2
Removed package 'Microsoft.AspNet.Mvc 5.2.2' from 'packages.config'
Successfully uninstalled 'Microsoft.AspNet.Mvc 5.2.2' from ConsoleApp2
Removed package 'Microsoft.AspNet.WebPages 3.2.2' from 'packages.config'
Successfully uninstalled 'Microsoft.AspNet.WebPages 3.2.2' from ConsoleApp2
Removed package 'Microsoft.Web.Infrastructure 1.0.0.0' from 'packages.config'
Successfully uninstalled 'Microsoft.Web.Infrastructure 1.0.0.0' from ConsoleApp2
Removed package 'Microsoft.Tpl.Dataflow 4.5.24' from 'packages.config'
Successfully uninstalled 'Microsoft.Tpl.Dataflow 4.5.24' from ConsoleApp2
Removed package 'Microsoft.AspNet.Razor 3.2.2' from 'packages.config'
Successfully uninstalled 'Microsoft.AspNet.Razor 3.2.2' from ConsoleApp2
Package 'Microsoft.AspNet.Razor.3.2.2' already exists in folder 'C:\Users\wesh\source\repos\ConsoleApp2\packages'
Added package 'Microsoft.AspNet.Razor.3.2.2' to 'packages.config'
Successfully installed 'Microsoft.AspNet.Razor 3.2.2' to ConsoleApp2
Package 'Microsoft.Tpl.Dataflow.4.5.24' already exists in folder 'C:\Users\wesh\source\repos\ConsoleApp2\packages'
Added package 'Microsoft.Tpl.Dataflow.4.5.24' to 'packages.config'
Successfully installed 'Microsoft.Tpl.Dataflow 4.5.24' to ConsoleApp2
Package 'Microsoft.Web.Infrastructure.1.0.0' already exists in folder 'C:\Users\wesh\source\repos\ConsoleApp2\packages'
Added package 'Microsoft.Web.Infrastructure.1.0.0' to 'packages.config'
Successfully installed 'Microsoft.Web.Infrastructure 1.0.0' to ConsoleApp2
Package 'Microsoft.AspNet.WebPages.3.2.2' already exists in folder 'C:\Users\wesh\source\repos\ConsoleApp2\packages'
Added package 'Microsoft.AspNet.WebPages.3.2.2' to 'packages.config'
Successfully installed 'Microsoft.AspNet.WebPages 3.2.2' to ConsoleApp2
Package 'Microsoft.AspNet.Mvc.5.2.2' already exists in folder 'C:\Users\wesh\source\repos\ConsoleApp2\packages'
Added package 'Microsoft.AspNet.Mvc.5.2.2' to 'packages.config'
Successfully installed 'Microsoft.AspNet.Mvc 5.2.2' to ConsoleApp2
Package 'Newtonsoft.Json.6.0.4' already exists in folder 'C:\Users\wesh\source\repos\ConsoleApp2\packages'
Added package 'Newtonsoft.Json.6.0.4' to 'packages.config'
Executing script file 'C:\Users\wesh\source\repos\ConsoleApp2\packages\Newtonsoft.Json.6.0.4\tools\install.ps1'
Successfully installed 'Newtonsoft.Json 6.0.4' to ConsoleApp2
Package 'Microsoft.AspNet.WebApi.Client.5.2.2' already exists in folder 'C:\Users\wesh\source\repos\ConsoleApp2\packages'
Added package 'Microsoft.AspNet.WebApi.Client.5.2.2' to 'packages.config'
Successfully installed 'Microsoft.AspNet.WebApi.Client 5.2.2' to ConsoleApp2
Package 'Microsoft.AspNet.WebApi.Core.5.2.2' already exists in folder 'C:\Users\wesh\source\repos\ConsoleApp2\packages'
Added package 'Microsoft.AspNet.WebApi.Core.5.2.2' to 'packages.config'
Successfully installed 'Microsoft.AspNet.WebApi.Core 5.2.2' to ConsoleApp2
Package 'Microsoft.AspNet.WebHooks.Common.1.2.1' already exists in folder 'C:\Users\wesh\source\repos\ConsoleApp2\packages'
Added package 'Microsoft.AspNet.WebHooks.Common.1.2.1' to 'packages.config'
Successfully installed 'Microsoft.AspNet.WebHooks.Common 1.2.1' to ConsoleApp2
Package 'Microsoft.AspNet.WebHooks.Custom.1.2.1' already exists in folder 'C:\Users\wesh\source\repos\ConsoleApp2\packages'
Added package 'Microsoft.AspNet.WebHooks.Custom.1.2.1' to 'packages.config'
Successfully installed 'Microsoft.AspNet.WebHooks.Custom 1.2.1' to ConsoleApp2
Package 'Microsoft.AspNet.WebHooks.Custom.Mvc.1.2.1' already exists in folder 'C:\Users\wesh\source\repos\ConsoleApp2\packages'
Added package 'Microsoft.AspNet.WebHooks.Custom.Mvc.1.2.1' to 'packages.config'
Successfully installed 'Microsoft.AspNet.WebHooks.Custom.Mvc 1.2.1' to ConsoleApp2
Executing nuget actions took 3.07 sec
Time Elapsed: 00:00:24.3488176

[tfritzke]

@weshaggard
In your case, the package is being reinstalled from the package cache for the solution:
Package 'Microsoft.Tpl.Dataflow.4.5.24' already exists in folder 'C:\Users\wesh\source\repos\ConsoleApp2\packages'
Please retest:

1. Delete the packages directory,
2. Run the command "Update-Package -Reinstall" without any additional parameters.

[weshaggard]

OK I was able to repro it now as it seems as though it only fails if trying to install or update Microsoft.Tpl.Dataflow package without a specified version.

To workaround you can call Update-Package -Reinstall Microsoft.AspNet.WebHooks.Custom.Mvc which will work because it is installing/updating to a specific version of Microsoft.Tpl.Dataflow.

@rrelyea to repro this you can do:

PM> install-package Microsoft.Tpl.Dataflow
install-package : Unable to find package 'Microsoft.Tpl.Dataflow'
At line:1 char:1
+ install-package Microsoft.Tpl.Dataflow
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : NotSpecified: (:) [Install-Package], Exception
    + FullyQualifiedErrorId : NuGetCmdletUnhandledException,NuGet.PackageManagement.PowerShellCmdlets.InstallPackageCommand
 
Time Elapsed: 00:00:00.2303222

When someone does a general update like Update-Package -Reinstall it loops through all packages and calls update on each without a specified version and thus fails when it hits Microsoft.Tpl.Dataflow.

It works if you specify the version like:

PM> install-package Microsoft.Tpl.Dataflow -version 4.5.24


Attempting to gather dependency information for package 'Microsoft.Tpl.Dataflow.4.5.24' with respect to project 'ConsoleApp2', targeting '.NETFramework,Version=v4.6.1'
Gathering dependency information took 2.66 ms
Attempting to resolve dependencies for package 'Microsoft.Tpl.Dataflow.4.5.24' with DependencyBehavior 'Lowest'
Resolving dependency information took 0 ms
Resolving actions to install package 'Microsoft.Tpl.Dataflow.4.5.24'
Resolved actions to install package 'Microsoft.Tpl.Dataflow.4.5.24'
Found package 'Microsoft.Tpl.Dataflow 4.5.24' in 'C:\Users\wesh\source\repos\ConsoleApp2\packages'.
Package 'Microsoft.Tpl.Dataflow.4.5.24' already exists in folder 'C:\Users\wesh\source\repos\ConsoleApp2\packages'
Added package 'Microsoft.Tpl.Dataflow.4.5.24' to 'packages.config'
Successfully installed 'Microsoft.Tpl.Dataflow 4.5.24' to ConsoleApp2
Executing nuget actions took 504.67 ms
Time Elapsed: 00:00:00.6016677
PM> 

@rrelyea is this the expected behavior for unlisted packages?

[hennys]

We are running into the exact same issues after the unlisting.

For a bit of background, our CMS Library, which has net461 and netstandard2.0 targets, is using Dataflows. We wanted to use the newer System.Threading.Tasks.Dataflow package, but as it only has .NET Standard and Portable targets, any .NET Framwork 4.6.x application that uses our library would end up with the .NET Standard 2.0 version, which in turn brings with it all sorts of issues. Instead we chose to make it a conditional dependency and use the Microsoft.Tpl.Dataflow package in the net461 compilation.
This could then be removed once we will be able to move our platform requirement to .NET Framework 4.7.2. (While we have no problem with this, we have thousands of customers who are making this decision, many who has been constrained by Azure Web Apps until recently).

Until the Microsoft.Tpl.Dataflow package was delisted we were pretty happy to stick with this solution but this is not really feasible anymore with the issues that the delisting is causing for our users when they are trying to update our package.

With this in mind I'm hoping that you would reconsider the delisting, or even better, add a proper .NET Framework target to the System.Threading.Tasks.Dataflow package.

[weshaggard]

@rrelyea is there anything we can do in the package manager console to better handle unlisted packages? We need a way to let our customers know they shouldn't be installing this package any more while not breaking existing customer projects that still reference it.