Set "TreatWarningsAsErrors" before NuGet restore
Set "TreatWarningsAsErrors" before NuGet restore

* Ensures our build stays clean of NuGet warnings
aspnet/AspNetCore,aspnet/AspNetCore,aspnet/AspNetCore,aspnet/AspNetCore,aspnet/AspNetCore,aspnet/AspNetCore,aspnet/AspNetCore,aspnet/AspNetCore,aspnet/AspNetCore