VSTS build: Packages failed to restore - Unable to resolve 'NETStandard.Library (>= 1.6.1)' for '.NETStandard,Version=v2.0'

Question

I\'m getting

Unable to resolve \'NETStandard.Library (>= 1.6.1)\' for \'.NETStandard,Version=v2.0\'.

in VSTS build using Hosted

Answer 1

Update 18/09/2017

Step 2 is no longer needed. I've left it in the solution though as it may still help some people. Thanks, @Liero for point this out.

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Original Answer

I've just experienced this problem too and solved it by doing three things:

1. Use the .NET Core SDK(! - not runtime!) version 2.0.0:

2. Use the latest NuGet feed (4.3.0):

3. Restore your packages:

Update It's worth mentioning here that you should specify where you get your NuGet packages from. Most applications will probably just use the NuGet.org feed, as per the screenshot (see small checkbox), but you may have your custom feeds specified in a NuGet.config file. In that case, tick 'Feeds in my NuGet.config' and then specify the path to that file.

To illustrate the order, this is my working queue:

I hope this helps you and anyone else who has come up against this problem. If you have any questions, let me know. :)