Update version to 17.6

[Forgind]

Lot less to do without the build status messages!

Do you think we should update the PackageValidationBaselineVersion to 17.5.0?

[rainersigwald]

Do you think we should update the PackageValidationBaselineVersion to 17.5.0?

We can't, because it doesn't exist. We could update to 17.5.0-previewXXXXX, and I proposed doing that in #8116 (comment).

[Forgind]

Do you think we should update the PackageValidationBaselineVersion to 17.5.0?

We can't, because it doesn't exist. We could update to 17.5.0-previewXXXXX, and I proposed doing that in #8116 (comment).

Good point. Is there any reason it's better to update to 17.5-preview now, as opposed to just waiting until 17.5.0 is available? It would protect us if we change an API we'd just added, but it seems ok to me to have our errors for that be slightly delayed.

[rainersigwald]

It would protect us if we change an API we'd just added

Yeah I think that's the biggest thing, and seems worth the cost to me.

[Forgind]

Do we know what channel it looks at to find the version of MSBuild it requests? I vaguely remembered it pulling from nuget.org, at least as an option. I'm wondering how to see which preview versions are available.

[rainersigwald]

It'll look at these:

msbuild/NuGet.config

Lines 5 to 8 in ab3d68e

	<add key="arcade" value="https://pkgs.dev.azure.com/dnceng/public/_packaging/dotnet-eng/nuget/v3/index.json" />
	<add key="dotnet-public" value="https://pkgs.dev.azure.com/dnceng/public/_packaging/dotnet-public/nuget/v3/index.json" />
	<add key="dotnet-tools" value="https://pkgs.dev.azure.com/dnceng/public/_packaging/dotnet-tools/nuget/v3/index.json" />
	<add key="dotnet6" value="https://pkgs.dev.azure.com/dnceng/public/_packaging/dotnet6/nuget/v3/index.json" />

and dotnet-tools is the relevant one:

https://dev.azure.com/dnceng/public/_artifacts/feed/dotnet-tools/NuGet/Microsoft.Build/versions/17.5.0-preview-23059-01

[Forgind]

Sounds good! Thanks for finding that. I pushed the change.