DefaultConfig for nuget config file produces invalid config

[timheuer]

NuGetProvider/NugetLightRequest.cs

Lines 85 to 89 in 16519ed

	internal const string DefaultConfig = @"<?xml version=""1.0""?>
	<configuration>
	<packageSources>
	</packageSources>
	</configuration>";

Is the default config for a nuget.config if not found in this provider code. It produces an invalid nuget.config (no sources) and can result in a machine not being able to do any restores for apps or other things relying on nuget going forward.

[zivkan]

FWIW, this appears to be affecting a bunch of Azure Pipelines and GitHub Actions customers: actions/runner-images#5768