Visual Studio 2017 Unable to resolve dependencies

I am trying to add the Microsoft.AspNetCore.Cors Nuget package to my Visual Studio 2017 project. I am getting this error:
"Unable to resolve dependencies. System.Globalization.Calendars 4.0.1 is not compatible with NetStandard Library 1.6.1 constraint: System.Globalization.Calendars (>=4.3.0)".
The System.Globalization.Calendars package is installed. I've tried taking it out. When I do that and try to install Cors, it tells me it can't find a version of System.Globalization.Calendarsthat is compatible with NetStandard.Library 1.6.1. Any idea what I am missing? Thank you.
dodgerfanAsked:
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sarabandeCommented:
there are younger versions of the calendars package available up to version 4.4. for example at

    https://api.haxe.org/cs/system/globalization/Calendar.html

also in msdn the current version is 4.3. so, you should try to find out why the package you were using was not updated when installing new vs 2017. it could help to use the installer and add some more optional components. do you still have older versions of visual studio installed? is it possible that your builds are not using the newest libraries coming with vs2017?

Sara
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