In a NuGet package, in its .nuspec file, the package dependencies are specified on a per-target framework basis. E.g., in the System.Collections.NonGeneric package, here are its TF dependencies:
<dependencies><group targetFramework="MonoAndroid1.0" /><group targetFramework="MonoTouch1.0" /><group targetFramework=".NETFramework4.6" /><group targetFramework=".NETStandard1.3"><dependency id="System.Diagnostics.Debug" version="4.3.0" exclude="Compile" /><dependency id="System.Globalization" version="4.3.0" /><dependency id="System.Resources.ResourceManager" version="4.3.0" exclude="Compile" /><dependency id="System.Runtime" version="4.3.0" /><dependency id="System.Runtime.Extensions" version="4.3.0" exclude="Compile" /><dependency id="System.Threading" version="4.3.0" exclude="Compile" /></group><group targetFramework="Xamarin.iOS1.0" /><group targetFramework="Xamarin.Mac2.0" /><group targetFramework="Xamarin.TVOS1.0" /><group targetFramework="Xamarin.WatchOS1.0" /></dependencies>It of course doesn't contain all TFMs, so my question: What happens if my calling application is targeting .NET Framework 4.6.1 (.NET Standard 1.4)? Will the 6 System.* packages still need to be downloaded, since .NET Standard 1.4 >= 1.3? Or since I am not specifically targeting a .NET Standard 1.3 TFM, there are no dependencies for my project? Thanks for the clarification.