System.Text.Json by: Microsoft

Provides high-performance and low-allocating types that serialize objects to JavaScript Object Notation (JSON) text and deserialize JSON text to objects, with UTF-8 support built-in. Also provides types to read and write JSON text encoded as UTF-8, and to create an in-memory document object model (DOM), that is read-only, for random access of the JSON elements within a structured view of the data. Commonly Used Types: System.Text.Json.JsonSerializer System.Text.Json.JsonDocument System.Text.Json.JsonElement System.Text.Json.Utf8JsonWriter System.Text.Json.Utf8JsonReader

System.Threading.Tasks by: Robert McLaws, Jrmie "Garuma" Laval

**NOTE: This package has moved to System.Threading.Tasks.Unofficial** This package is a port of the Mono version of the *complete* Task Parallel Library (not a subset) to .NET 3.5, as well as all Silverlight platforms, including Windows Phone 7.x. This version contains more classes (and is namespace compatible with the BCL) compared to the PortableTPL project. This project supercedes the TaskParallelLibrary.WP7 package, and is licensed under the same licenses as the rest of the Mono framework.

Validation by: Andrew Arnott

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

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

Vector Drawable Android Support Library C# bindings for Xamarin

Xamarin.Build.Download by: Microsoft

Support for downloading and unpacking archives when building MSBuild projects