Update dot net core

[chidozieononiwu]

Update DotNet Core SDK and Runtime to the latest version on build agents
Windows-2019
Ubuntu 18.04.4

[weshaggard]

Is there an issue associated with this PR? Why are we adding 3.1 as a new baseline? We should consider moving our baseline up to 3.1 if we want a newer version otherwise we start to pay a higher cost for running multiple versions.

[chidozieononiwu]

Is there an issue associated with this PR? Why are we adding 3.1 as a new baseline? We should consider moving our baseline up to 3.1 if we want a newer version otherwise we start to pay a higher cost for running multiple versions.

Yes, there is Issue 11014.
I spoke with @AlexGhiondea he said we should run both netcoreapp2.1 and netcoreapp3.1 for a few months before finally switching to only 3.1.

[weshaggard]

I spoke with @AlexGhiondea he said we should run both netcoreapp2.1 and netcoreapp3.1 for a few months before finally switching to only 3.1.

@AlexGhiondea are you suggesting we move the supported baseline of .NET Core up to 3.1 in a few months? Based on https://dotnet.microsoft.com/platform/support/policy/dotnet-core .NET Core 2.1 is LTS under support until Aug 2021.

[weshaggard]

While we are updating can you also update the latest patch version of 2.1? Looks like 2.1.17 https://dotnet.microsoft.com/download/dotnet-core/2.1.

[weshaggard]

What is this needed for?

[chidozieononiwu]

I was following instructions here to try and fix NuGet Error NU1605 that was occurring in Azure.Messaging.EventHubs.Processor.Samples

[weshaggard]

I don't think this is the right solution. Can you show the exact error you were hitting?

[weshaggard]

The build must be failing because of either this change or the DotNetCoreSDKVersion change. I'd suggest trying to isolate each to see what is causing the build failures.

[chidozieononiwu]

Closing this, will pick up the work later.