System.Collections.Immutable by: Microsoft

This package provides collections that are thread safe and guaranteed to never change their contents, also known as immutable collections. Like strings, any methods that perform modifications will not change the existing instance but instead return a new instance. For efficiency reasons, the implementation uses a sharing mechanism to ensure that newly created instances share as much data as possible with the previous instance while ensuring that operations have a predictable time complexity. The System.Collections.Immutable library is built-in as part of the shared framework in .NET Runtime. The package can be installed when you need to use it in other target frameworks.

System.CodeDom by: Microsoft

Provides types that can be used to model the structure of a source code document and to output source code for that model in C# or Visual Basic.

StackExchange.Redis by: Stack Exchange, Inc., Marc Gravell, Nick Craver

High performance Redis client, incorporating both synchronous and asynchronous usage.

System.Buffers by: Microsoft

System.Buffers

System.Composition.Hosting by: Microsoft

Provides Managed Extensibility Framework (MEF) types that are useful to developers of extensible applications, or hosts.

System.Composition.Convention by: Microsoft

Provides types that support using Managed Extensibility Framework (MEF) with a convention-based configuration model.

System.ComponentModel.Annotations by: Microsoft

Provides attributes that are used to define metadata for objects used as data sources. Commonly Used Types: System.ComponentModel.DataAnnotations.ValidationResult System.ComponentModel.DataAnnotations.IValidatableObject System.ComponentModel.DataAnnotations.ValidationAttribute System.ComponentModel.DataAnnotations.RequiredAttribute System.ComponentModel.DataAnnotations.StringLengthAttribute System.ComponentModel.DataAnnotations.DisplayAttribute System.ComponentModel.DataAnnotations.RegularExpressionAttribute System.ComponentModel.DataAnnotations.DataTypeAttribute System.ComponentModel.DataAnnotations.RangeAttribute System.ComponentModel.DataAnnotations.KeyAttribute When using NuGet 3.x this package requires at least version 3.4.

System.Composition.AttributedModel by: Microsoft

Provides the foundational attributes that allow you to declare parts for composition, such as imports, exports, and metadata with the Managed Extensibility Framework (MEF).

runtime.unix.System.Runtime.Extensions by: Microsoft

Internal implementation package not meant for direct consumption. Please do not reference directly. Provides commonly-used classes for performing mathematical functions, conversions, string comparisons and querying environment information. Commonly Used Types: System.Math System.Environment System.Random System.Progress<T> System.Convert System.Diagnostics.Stopwatch System.Runtime.Versioning.FrameworkName System.StringComparer System.IO.Path When using NuGet 3.x this package requires at least version 3.4.

System.AppContext by: Microsoft

Provides the System.AppContext class, which allows access to the BaseDirectory property and other application specific data. Commonly Used Types: System.AppContext When using NuGet 3.x this package requires at least version 3.4.

Snappier by: btburnett3

A near-C++ performance implementation of the Snappy compression algorithm for .NET. Snappier is ported to C# directly from the official C++ implementation, with the addition of support for the framed stream format. By avoiding P/Invoke, Snappier is fully cross-platform and works on both Linux and Windows and against any CPU supported by .NET. However, Snappier performs best in .NET 6 and later on little-endian x86/64 processors with the help of System.Runtime.Instrinsics.

System.ComponentModel by: Microsoft

Provides interfaces for the editing and change tracking of objects used as data sources. Commonly Used Types: System.ComponentModel.CancelEventArgs System.IServiceProvider System.ComponentModel.IEditableObject System.ComponentModel.IChangeTracking System.ComponentModel.IRevertibleChangeTracking When using NuGet 3.x this package requires at least version 3.4.

System.Collections.Specialized by: Microsoft

Provides older specialized non-generic collections; for example, a linked list dictionary, a bit vector, and collections that contain only strings. Commonly Used Types: System.Collections.Specialized.NameValueCollection System.Collections.Specialized.NameObjectCollectionBase System.Collections.Specialized.StringCollection System.Collections.Specialized.IOrderedDictionary System.Collections.Specialized.HybridDictionary System.Collections.Specialized.OrderedDictionary System.Collections.Specialized.ListDictionary System.Collections.Specialized.StringDictionary System.Collections.Specialized.BitVector32 When using NuGet 3.x this package requires at least version 3.4.

System.Composition by: Microsoft

Provides a version of the Managed Extensibility Framework (MEF) that is lightweight and specifically optimized for high throughput scenarios, such as the web.

System.ComponentModel.TypeConverter by: Microsoft

Provides the System.ComponentModel.TypeConverter class, which represents a unified way of converting types of values to other types. Commonly Used Types: System.ComponentModel.TypeConverter System.ComponentModel.TypeConverterAttribute System.ComponentModel.PropertyDescriptor System.ComponentModel.StringConverter System.ComponentModel.ITypeDescriptorContext System.ComponentModel.EnumConverter System.ComponentModel.TypeDescriptor System.ComponentModel.Int32Converter System.ComponentModel.BooleanConverter System.ComponentModel.DoubleConverter When using NuGet 3.x this package requires at least version 3.4.

System.Collections.NonGeneric by: Microsoft

Provides classes that define older non-generic collections of objects, such as lists, queues, hash tables and dictionaries. Developers should prefer the generic collections in the System.Collections package. Commonly Used Types: System.Collections.ArrayList System.Collections.Hashtable System.Collections.CollectionBase System.Collections.ReadOnlyCollectionBase System.Collections.Stack System.Collections.SortedList System.Collections.DictionaryBase System.Collections.Queue System.Collections.Comparer System.Collections.CaseInsensitiveComparer When using NuGet 3.x this package requires at least version 3.4.

System.Collections.Concurrent by: Microsoft

Provides several thread-safe collection classes that should be used in place of the corresponding types in the System.Collections.NonGeneric and System.Collections packages whenever multiple threads are accessing the collection concurrently. Commonly Used Types: System.Collections.Concurrent.ConcurrentDictionary<TKey, TValue> System.Collections.Concurrent.ConcurrentQueue<T> System.Collections.Concurrent.ConcurrentBag<T> System.Collections.Concurrent.BlockingCollection<T> System.Collections.Concurrent.ConcurrentStack<T> When using NuGet 3.x this package requires at least version 3.4.

System.ComponentModel.Primitives by: Microsoft

Provides interfaces that are used to implement the run-time and design-time behavior of components. Commonly Used Types: System.ComponentModel.IComponent System.ComponentModel.IContainer System.ComponentModel.ISite System.ComponentModel.ComponentCollection When using NuGet 3.x this package requires at least version 3.4.

Snappy.Standard by: David Rouyer

.NET Standard client for Google's Snappy compression library inspired by Snappy.NET. Snappy is a very fast compression(250 MB/sec)/decompression(500 MB/sec) library written in C++.

SQLitePCLRaw.bundle_green by: Eric Sink

This 'batteries-included' bundle brings in SQLitePCLRaw.core and the necessary stuff for certain common use cases. Call SQLitePCL.Batteries.Init(). Policy of this bundle: iOS=system SQLite, others=e_sqlite3 included. Note that this bundle is identical to bundle_e_sqlite3, except on iOS where it uses the system SQLite library instead of e_sqlite3. In other words, when you use this bundle in a cross-platform app, your app is not using the same SQLite build configuration on all platforms.