System.CommandLine.NamingConventionBinder by: Microsoft

This package provides command handler support for System.CommandLine performs parameter and model binding by matching option and argument names to parameter and property names.

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.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.

System.CommandLine.DragonFruit by: Microsoft

This package includes the experimental DragonFruit app model for System.CommandLine, which allows you to create a command line application using only a Main method while getting support for complex type binding, error reporting, help, shell completions, and more.

System.Buffers.Primitives by: Microsoft Corporation

Slices of arrays and buffers

System.AppDomain by: Shmueli Englard

Exposes the hidden System.AppDomain in .NET Core. Required supporting classes are also exposed.

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.Binary by: Microsoft Corporation

Non-allocating ninary reader and writer

Syncfusion.Maui.Toolkit by: Syncfusion Inc.

This package contains the Syncfusion Toolkit components for .NET MAUI

SystemCommon by: sunkaixuan

SystemCommon

System.CommandLine by: Microsoft

Support for parsing command lines, supporting both POSIX and Windows conventions and shell-agnostic command line completions.

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.CommandLine.Rendering by: Microsoft

This package provides support for structured command line output rendering. Write code once that renders correctly in multiple output modes, including System.Console, virtual terminal (using ANSI escape sequences), and plain text.

System.Collections.Sequences by: Microsoft Corporation

Non-allocating collections

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.Collections by: Microsoft

Provides classes that define generic collections, which allow developers to create strongly typed collections that provide better type safety and performance than non-generic strongly typed collections. Commonly Used Types: System.Collections.Generic.List<T> System.Collections.Generic.Dictionary<TKey, TValue> System.Collections.Generic.Queue<T> System.Collections.Generic.Stack<T> System.Collections.Generic.HashSet<T> System.Collections.Generic.LinkedList<T> System.Collections.Generic.EqualityComparer<T> System.Collections.Generic.Comparer<T> System.Collections.Generic.SortedDictionary<TKey, TValue> 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.

System.Buffers by: Microsoft

System.Buffers

System.ClientModel by: Microsoft

Contains building blocks for clients that call cloud services.

System.Collections.Immutable.Net40 by: Microsoft Corporation

Retargeted for .Net 4.0. Unofficial, unsupported build https://github.com/jlanng/ImmutableCollectionsNet40