Review topics that use Visual Studio 2017 RC

[mairaw]

Some screenshots and instructions might have changed with the RC3 release.

[guardrex]

@guardrex: csharp/getting-started/ but not csharp/getting-started/with-visual-studio-2017

[guardrex]

@mairaw I'm ready to engage on this one at 12 noon PST. Is the renaming work on VS2017 RTM initial update (#1663) done, or should I hold off this for a bit and work on Fixup dotnet command line syntax (#1656)?

[mairaw]

I've only renamed the topic I was touching and the images that it was using. You can rename the others on yours or I can rename all in mine and you make the other updates. Please let me know how you prefer @guardrex. Thanks!

[guardrex]

@mairaw Deal! 🤝 ... I'll take care of the rest of the VS2017 updates under csharp/getting-started/ following your lead from #1663.