System.Xml.XmlSerializer by: Microsoft

Provides classes for serializing objects to the Extensible Markup Language (XML) and deserializing XML data to objects. Commonly Used Types: System.Xml.Serialization.IXmlSerializable System.Xml.Serialization.XmlSerializer System.Xml.Serialization.XmlIgnoreAttribute System.Xml.Serialization.XmlElementAttribute System.Xml.Serialization.XmlAttributeAttribute System.Xml.Serialization.XmlArrayAttribute System.Xml.Serialization.XmlRootAttribute System.Xml.Serialization.XmlArrayItemAttribute System.Xml.Serialization.XmlTypeAttribute System.Xml.Serialization.XmlEnumAttribute When using NuGet 3.x this package requires at least version 3.4.

System.Xml.XPath by: Microsoft

Provides the classes that define a cursor model for navigating and editing Extensible Markup Language (XML) information items as instances of the XQuery 1.0 and XPath 2.0 Data Model. Commonly Used Types: System.Xml.XPath.XPathNavigator System.Xml.XPath.IXPathNavigable System.Xml.XPath.XPathNodeType System.Xml.XPath.XPathNodeIterator System.Xml.XPath.XPathExpression System.Xml.XPath.XPathResultType System.Xml.XPath.XPathException System.Xml.XPath.XPathDocument System.Xml.XPath.XPathItem System.Xml.XPath.XPathNamespaceScope When using NuGet 3.x this package requires at least version 3.4.

System.Xml.XPath.XDocument by: Microsoft

Provides extension methods that add System.Xml.XPath support to the System.Xml.XDocument package. Commonly Used Types: System.Xml.XPath.Extensions System.Xml.XPath.XDocumentExtensions When using NuGet 3.x this package requires at least version 3.4.

System.Xml.XPath.XmlDocument by: Microsoft

System.Xml.XPath.XmlDocument

Utf8Json by: neuecc

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

Validation by: Andrew Arnott

Method input validation and runtime checks that report errors or throw exceptions when failures are detected.

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

Animated Vector Drawable Android Support Library C# bindings for Xamarin

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

Compat Android Support Library C# bindings for Xamarin

Xamarin.Android.Support.Core.UI by: Xamarin Inc.

Core UI Android Support Library C# bindings for Xamarin

Xamarin.Android.Support.Core.Utils by: Xamarin Inc.

Core Utils Android Support Library C# bindings for Xamarin

Xamarin.Android.Support.CustomTabs by: Xamarin Inc.

Custom Tabs Android Support Library C# bindings for Xamarin

Xamarin.Android.Support.Fragment by: Xamarin Inc.

Fragment Android Support Library C# bindings for Xamarin

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

Media Compat Android Support Library C# bindings for Xamarin

Xamarin.Android.Support.v13 by: Xamarin Inc.

v13 Android Support Library C# bindings for Xamarin

Xamarin.Android.Support.v4 by: Xamarin Inc.

v4 Android Support Library C# bindings for Xamarin

Xamarin.Android.Support.v7.AppCompat by: Xamarin Inc.

v7 AppCompat 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.Build.Download by: Microsoft

Support for downloading and unpacking archives when building MSBuild projects

xunit by: jnewkirk bradwilson

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, xunit.assert, and xunit.analyzers.