System.Xml.XmlDocument by: Microsoft

Provides an older in-memory Extensible Markup Language (XML) programming interface that enables you to modify XML documents. Developers should prefer the classes in the System.Xml.XDocument package.

Twilio by: Twilio

Twilio REST API helper library

Xamarin.Android.Support.Compat by: Xamarin Inc.

Compat Android Support Library C# bindings for Xamarin

Xamarin.Android.Support.Vector.Drawable by: Xamarin Inc.

Vector Drawable Android Support Library C# bindings for Xamarin

Xamarin.AndroidX.Migration by: Microsoft

This package provides a set of tools and MSBuild tasks to aid in the migration from Android Support to Android X.

Xamarin.Facebook.LoginKit.iOS by: Microsoft

C# binding for Facebook LoginKit's official SDK

Xamarin.Firebase.iOS.Crashlytics by: Microsoft

C# bindings for Firebase APIs Crashlytics iOS Library

Xamarin.Google.iOS.SignIn by: Microsoft

C# bindings for Google APIs Sign In iOS Library

xunit by: James Newkirk, Brad Wilson

xUnit.net is a developer testing framework, built to support Test Driven Development, with a design goal of extreme simplicity and alignment with framework features. Installing this package installs xunit.core and xunit.assert.

xunit.extensibility.core by: jnewkirk, bradwilson

Includes xunit.core.dll for extensibility purposes. Supports .NET 4.5.2 or later, and .NET Standard 1.1.

xunit.extensibility.execution by: jnewkirk, bradwilson

Includes xunit.execution.*.dll for extensibility purposes. Supports .NET 4.5.2 or later, and .NET Standard 1.1.

xunit.runner.visualstudio by: James Newkirk, Brad Wilson

Visual Studio 2012+ Test Explorer runner for the xUnit.net framework. Capable of running xUnit.net v1.9.2 and v2.0+ tests. Supported platforms: - Desktop .NET 2.0+ - .NET Core (including ASP.NET Core) 1.0+ - Universal Windows App 10+