System.Globalization by: Microsoft

Provides classes that define culture-related information, including language, country/region, calendars in use, format patterns for dates, currency, and numbers, and sort order for strings. Commonly Used Types: System.Globalization.DateTimeFormatInfo System.Globalization.CultureInfo System.Globalization.NumberFormatInfo System.Globalization.CalendarWeekRule System.Globalization.TextInfo System.Globalization.Calendar System.Globalization.CompareInfo System.Globalization.CompareOptions System.Globalization.UnicodeCategory When using NuGet 3.x this package requires at least version 3.4.

System.Globalization.Calendars by: Microsoft

Provides classes for performing date calculations using specific calendars, including the Gregorian, Julian, Hijri and Korean calendars. Commonly Used Types: System.Globalization.HijriCalendar System.Globalization.GregorianCalendar System.Globalization.HebrewCalendar System.Globalization.KoreanCalendar System.Globalization.ThaiBuddhistCalendar System.Globalization.TaiwanCalendar System.Globalization.JapaneseCalendar System.Globalization.GregorianCalendarTypes System.Globalization.PersianCalendar System.Globalization.UmAlQuraCalendar When using NuGet 3.x this package requires at least version 3.4.

System.Globalization.Extensions by: Microsoft

Provides classes for performing Unicode string normalization, culture-specific string comparisons and support the use of non-ASCII characters for Internet domain names. Commonly Used Types: System.StringNormalizationExtensions System.Text.NormalizationForm System.Globalization.IdnMapping When using NuGet 3.x this package requires at least version 3.4.

System.IdentityModel.Tokens.Jwt by: Microsoft

Includes types that provide support for creating, serializing and validating JSON Web Tokens. As of IdentityModel 7x, this is a legacy tool that should be replaced with Microsoft.IdentityModel.JsonWebTokens.

System.IO by: Microsoft

Provides base input and output (I/O) types, including System.IO.Stream, System.IO.StreamReader and System.IO.StreamWriter, that allow reading and writing to data streams Commonly Used Types: System.IO.Stream System.IO.EndOfStreamException System.IO.MemoryStream System.IO.StreamReader System.IO.StreamWriter System.IO.StringWriter System.IO.TextWriter System.IO.TextReader When using NuGet 3.x this package requires at least version 3.4.

System.IO.Compression by: Microsoft

Provides classes that support the compression and decompression of streams. Commonly Used Types: System.IO.Compression.DeflateStream System.IO.Compression.GZipStream System.IO.Compression.CompressionMode System.IO.Compression.CompressionLevel System.IO.Compression.ZipArchiveEntry System.IO.Compression.ZipArchive System.IO.Compression.ZipArchiveMode When using NuGet 3.x this package requires at least version 3.4.

System.IO.Compression.ZipFile by: Microsoft

Provides classes that support the compression and decompression of streams using file system paths. Commonly Used Types: System.IO.Compression.ZipFile When using NuGet 3.x this package requires at least version 3.4.

System.IO.FileSystem by: Microsoft

Provides types that allow reading and writing to files and types that provide basic file and directory support. Commonly Used Types: System.IO.FileStream System.IO.FileInfo System.IO.DirectoryInfo System.IO.FileSystemInfo System.IO.File System.IO.Directory System.IO.SearchOption System.IO.FileOptions When using NuGet 3.x this package requires at least version 3.4.

System.IO.FileSystem.AccessControl by: Microsoft

Provides types for managing access and audit control lists for files and directories. Commonly Used Types: System.Security.AccessControl.DirectoryObjectSecurity System.Security.AccessControl.DirectorySecurity System.Security.AccessControl.FileSecurity System.Security.AccessControl.FileSystemAccessRule System.Security.AccessControl.FileSystemAuditRule System.Security.AccessControl.FileSystemRights System.Security.AccessControl.FileSystemSecurity When using NuGet 3.x this package requires at least version 3.4.

System.IO.FileSystem.Primitives by: Microsoft

Provides common enumerations and exceptions for path-based I/O libraries. Commonly Used Types: System.IO.DirectoryNotFoundException System.IO.FileAccess System.IO.FileLoadException System.IO.PathTooLongException System.IO.FileMode System.IO.FileShare System.IO.FileAttributes When using NuGet 3.x this package requires at least version 3.4.

System.IO.Hashing by: Microsoft

Provides non-cryptographic hash algorithms, such as CRC-32. Commonly Used Types: System.IO.Hashing.Crc32 System.IO.Hashing.XxHash32

System.IO.Packaging by: Microsoft

Provides classes that support storage of multiple data objects in a single container.

System.IO.Pipelines by: Microsoft

Single producer single consumer byte buffer management. Commonly Used Types: System.IO.Pipelines.Pipe System.IO.Pipelines.PipeWriter System.IO.Pipelines.PipeReader

System.IO.Ports by: Microsoft

Provides classes for controlling serial ports. Commonly Used Types: System.IO.Ports.SerialPort

System.Linq by: Microsoft

Provides classes and interfaces that supports queries that use Language-Integrated Query (LINQ). Commonly Used Types: System.Linq.Enumerable System.Linq.IGrouping<TKey, TElement> System.Linq.IOrderedEnumerable<TElement> System.Linq.ILookup<TKey, TElement> System.Linq.Lookup<TKey, TElement> When using NuGet 3.x this package requires at least version 3.4.

System.Linq.Async by: .NET Foundation and Contributors

Provides support for Language-Integrated Query (LINQ) over IAsyncEnumerable<T> sequences.

System.Linq.Dynamic.Core by: ZZZ Projects, Stef Heyenrath, Microsoft, Scott Guthrie, King Wilder, Nathan Arnott

This is a .NETStandard / .NET Core port of the the Microsoft assembly for the .Net 4.0 Dynamic language functionality.

System.Linq.Expressions by: Microsoft

Provides classes, interfaces and enumerations that enable language-level code expressions to be represented as objects in the form of expression trees. Commonly Used Types: System.Linq.IQueryable<T> System.Linq.IQueryable System.Linq.Expressions.Expression<TDelegate> System.Linq.Expressions.Expression System.Linq.Expressions.ExpressionVisitor When using NuGet 3.x this package requires at least version 3.4.

System.Linq.Queryable by: Microsoft

Provides classes for querying data structures that implement IQueryable<T>. Commonly Used Types: System.Linq.Queryable System.Linq.EnumerableQuery<T> System.Linq.EnumerableQuery When using NuGet 3.x this package requires at least version 3.4.

System.Management by: Microsoft

Provides access to a rich set of management information and management events about the system, devices, and applications instrumented to the Windows Management Instrumentation (WMI) infrastructure. Commonly Used Types: System.Management.ManagementClass System.Management.ManagementObject System.Management.SelectQuery