At the solution level there is only one NuGet package: Microsoft.NETCore.UniversalWindowsPlatform.
At the project level Common_2015 (Universal Windows) has the following references: Analyzers, Microsoft.NETCore.UniversalWindowsPlatform, Syncfusion Controls for UWP XAML, Version=13.4.0.53, UAP,Version=10.0.10240.0, WindowsDesktop, Version=10.0.10240.0, WindowsMobile, Version=10.0.10240.0.
At the project level SampleBrowser_2015 (Universal Windows) has the same references as common, pls: BehaviorsXamlSDKManaged, Version=12.0, C:\Users\Mark\AppData\Local\Syncfusion\EssentialStudio\13.4.0.53\UWP\SampleBrowser\Common\obj\x86\Release\Common_2015.dll, Microsoft.ApplicationInsights, Microsoft.ApplicationInsights.Extensibility.Windows, Microsoft.ApplicationInsights.PersistenceChannel, Microsoft.Data.Edm.WindowsStore, Microsoft.Data.OData.WindowsStore, Microsoft.Data.Services.Client.WindowsStore, Microsoft.Diagnostics.Tracing.EventSource, System.Spatial.WindowsStore. But does not have WindowsDesktop, Version=10.0.10240.0.