System.Reflection.Metadata by: Microsoft

This packages provides a low-level .NET (ECMA-335) metadata reader and writer. It's geared for performance and is the ideal choice for building higher-level libraries that intend to provide their own object model, such as compilers. Commonly Used Types: System.Reflection.Metadata.MetadataReader System.Reflection.PortableExecutable.PEReader System.Reflection.Metadata.Ecma335.MetadataBuilder System.Reflection.PortableExecutable.PEBuilder System.Reflection.PortableExecutable.ManagedPEBuilder When using NuGet 3.x this package requires at least version 3.4.

System.Runtime.WindowsRuntime.UI.Xaml by: Microsoft

Provides managed equivalents of Extensible Application Markup Language (XAML) UI types from Windows Runtime. Commonly Used Types: Windows.UI.Xaml.CornerRadius Windows.UI.Xaml.Duration Windows.UI.Xaml.DurationType Windows.UI.Xaml.GridLength Windows.UI.Xaml.GridUnitType Windows.UI.Xaml.Thickness Windows.UI.Xaml.Media.Matrix Windows.UI.Xaml.Media.Animation.KeyTime Windows.UI.Xaml.Media.Animation.RepeatBehavior Windows.UI.Xaml.Media.Animation.RepeatBehaviorType Windows.UI.Xaml.Media.Media3D.Matrix3D When using NuGet 3.x this package requires at least version 3.4.

System.ServiceModel.Primitives by: Microsoft

Provides common Windows Communication Foundation (WCF) types for consuming and communicating with services. Commonly Used Types: System.ServiceModel.ClientBase<TChannel> System.ServiceModel.IClientChannel System.ServiceModel.ICommunicationObject System.ServiceModel.Channels.IChannel System.ServiceModel.IContextChannel System.ServiceModel.IExtensibleObject<T> System.ServiceModel.DataContractFormatAttribute System.ServiceModel.Description.IOperationBehavior System.ServiceModel.Channels.Message System.ServiceModel.FaultException<TDetail> \r\n TFS ID: 1599443, GitHub SHA: https://github.com/dotnet/corefx/tree/eede273a4dfabcea608621f5e1bbf8ad00584cfb

Utf8Json by: neuecc

Definitely Fastest and Zero Allocation JSON Serializer for C#(NET, .NET Core, Unity, Xamarin).

Xamarin.Facebook.LoginKit.iOS by: Microsoft

C# binding for Facebook LoginKit's official SDK