Docs: Update .NET Core getting started docs to VS2019

[BethMassi]

https://docs.microsoft.com/en-us/dotnet/core/get-started - all docs currently say/show Visual Studio 2017. These need to be updated to Visual Studio 2019

List of high-pri articles to be updated:

• [x] https://docs.microsoft.com/en-us/dotnet/core/get-started
• [x] https://docs.microsoft.com/en-us/dotnet/core/tutorials/with-visual-studio
• [x] https://docs.microsoft.com/en-us/dotnet/core/tutorials/vb-with-visual-studio (Genevieve)
• [x] https://docs.microsoft.com/en-us/dotnet/core/tutorials/debugging-with-visual-studio (Genevieve)
• [x] https://docs.microsoft.com/en-us/dotnet/core/tutorials/publishing-with-visual-studio (Genevieve)
• [x] https://docs.microsoft.com/en-us/dotnet/core/tutorials/library-with-visual-studio (Genevieve)
• [x] https://docs.microsoft.com/en-us/dotnet/core/tutorials/vb-library-with-visual-studio (Genevieve)
• [x] https://docs.microsoft.com/en-us/dotnet/core/tutorials/testing-library-with-visual-studio (Maira)
• [x] https://docs.microsoft.com/en-us/dotnet/core/tutorials/consuming-library-with-visual-studio (Maira)
• [x] https://docs.microsoft.com/en-us/dotnet/core/tutorials/using-on-mac-vs-full-solution (Bill)
• [x] https://docs.microsoft.com/en-us/dotnet/core/tutorials/index
• [x] https://docs.microsoft.com/en-us/dotnet/csharp/getting-started/ (Genevieve)
• [ ] https://docs.microsoft.com/en-us/dotnet/csharp/language-reference/compiler-options/how-to-set-environment-variables-for-the-visual-studio-command-line (Bill)
• [x] https://docs.microsoft.com/en-us/dotnet/csharp/language-reference/compiler-options/nostdlib-compiler-option (Bill)
• [x] https://docs.microsoft.com/en-us/dotnet/fsharp/get-started/install-fsharp (Genevieve)
• [x] https://docs.microsoft.com/en-us/dotnet/fsharp/get-started/get-started-visual-studio (Genevieve)
• [x] TOC

edit by @mairaw: added article list

[BillWagner]

Assigned to @mairaw and I for now. We can more to someone else, if appropriate.

[mairaw]

Thanks @BethMassi. This has been on my backlog but I didn't have a tracking issue. We also want to make sure it matches the content for the videos /cc @JaySing

[mairaw]

I've added a prioritized list above. I've started a release branch for this because a lot of the Core tutorials are intertwined. Other minor updates I'm making directly to master.

Articles I didn't add to the list above:

• Desktop tutorials in the framework folder (/cc @Thraka)
• Architecture guide pages - there are a few e-book articles that still cover VS 2017. @nishanil would have to comment on a plan for those.

[mairaw]

@cartermp I've added some F# articles to the list but let me know if you'd prefer a separate issue for those.

[BethMassi]

@nishanil let me know what guides need updating and we can get those commissioned via the vendors if necessary.

[mairaw]

Adding @gewarren to the effort as well.

[gewarren]

@mairaw I think it will work better if you specifically assign topics to each person that's working on this. For instance, I didn't know that you'd already updated the main get-started page, so I was working on that last night. Or should I just pick some and assign them to myself in the list above?

[BillWagner]

@gewarren Proposal: We can each add our name to any topic above by editing the issue. If we all do that when we start working, we should be good.
Thoughts?

[gewarren]

@gewarren Proposal: We can each add our name to any topic above by editing the issue. If we all do that when we start working, we should be good.
Thoughts?

That works for me.

[mairaw]

@BillWagner could you take care of the ones involving a Mac?

[gewarren]

I believe my part of this issue is complete - the remaining articles are for Mac, C#, or F#. LMK if I should take any of those.

[mairaw]

Could you do the two F# ones as well @gewarren? It seems they would be simple to update.

[gewarren]

Could you do the two F# ones as well @gewarren? It seems they would be simple to update.

Sure.

[BillWagner]

If have PRs open for Visual Studio for Mac: #16349 and C# compiler options #16368

[mairaw]

I have a samples PR https://github.com/dotnet/samples/pull/1867 and one for consuming open https://github.com/dotnet/docs/pull/16367

Working on the testing one next

[gewarren]

@mairaw Can we merge the vs-2019 branch today?

[mairaw]

We should @gewarren. Last PR is ready for review #16371