System.Reflection.Metadata by: Microsoft

This package provides a low-level .NET (ECMA-335) metadata reader and writer. It's geared for performance and is the ideal choice for building higher-level libraries that intend to provide their own object model, such as compilers. The metadata format is defined by the ECMA-335 - Common Language Infrastructure (CLI) specification. The System.Reflection.Metadata 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.Runtime.Extensions by: Microsoft

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

System.Runtime.InteropServices by: Microsoft

Provides types that support COM interop and platform invoke services. Commonly Used Types: System.Runtime.InteropServices.GCHandle System.Runtime.InteropServices.GuidAttribute System.Runtime.InteropServices.COMException System.DllNotFoundException System.Runtime.InteropServices.DllImportAttribute

System.Runtime.InteropServices.RuntimeInformation by: Microsoft

Provides APIs to query about runtime and OS information. Commonly Used Types: System.Runtime.InteropServices.RuntimeInformation System.Runtime.InteropServices.OSPlatform When using NuGet 3.x this package requires at least version 3.4.

System.Security.Cryptography.Algorithms by: Microsoft

Provides base types for cryptographic algorithms, including hashing, encryption, and signing operations. Commonly Used Types: System.Security.Cryptography.Aes System.Security.Cryptography.RSA System.Security.Cryptography.RSAParameters System.Security.Cryptography.HMACSHA1 System.Security.Cryptography.SHA256 System.Security.Cryptography.SHA1 System.Security.Cryptography.SHA512 System.Security.Cryptography.SHA384 System.Security.Cryptography.HMACSHA256 System.Security.Cryptography.MD5 System.Security.Cryptography.HMACSHA384 System.Security.Cryptography.HMACSHA512 When using NuGet 3.x this package requires at least version 3.4.

System.Security.Cryptography.Primitives by: Microsoft

Provides common types for the cryptographic libraries. Commonly Used Types: System.Security.Cryptography.ICryptoTransform System.Security.Cryptography.AsymmetricAlgorithm System.Security.Cryptography.SymmetricAlgorithm System.Security.Cryptography.HashAlgorithm System.Security.Cryptography.KeyedHashAlgorithm System.Security.Cryptography.HMAC System.Security.Cryptography.KeySizes System.Security.Cryptography.CryptographicException System.Security.Cryptography.CipherMode System.Security.Cryptography.PaddingMode System.Security.Cryptography.CryptoStream System.Security.Cryptography.CryptoStreamMode When using NuGet 3.x this package requires at least version 3.4.

System.ServiceModel.Duplex by: Microsoft

Provides classes for consuming and communicating with duplex services. Commonly Used Types: System.ServiceModel.DuplexClientBase<TChannel> System.ServiceModel.InstanceContext

System.Text.Encodings.Web by: Microsoft

Provides types for encoding and escaping strings for use in JavaScript, HyperText Markup Language (HTML), and uniform resource locators (URL). Commonly Used Types: System.Text.Encodings.Web.HtmlEncoder System.Text.Encodings.Web.UrlEncoder System.Text.Encodings.Web.JavaScriptEncoder

System.Text.RegularExpressions by: Microsoft

Provides the System.Text.RegularExpressions.Regex class, an implementation of a regular expression engine. Commonly Used Types: System.Text.RegularExpressions.Regex System.Text.RegularExpressions.RegexOptions System.Text.RegularExpressions.Match System.Text.RegularExpressions.Group System.Text.RegularExpressions.Capture System.Text.RegularExpressions.MatchEvaluator When using NuGet 3.x this package requires at least version 3.4.

System.Threading.AccessControl by: Microsoft

Provides support for managing access and audit control lists for synchronization primitives. Commonly Used Types: System.Security.AccessControl.EventWaitHandleAccessRule System.Security.AccessControl.EventWaitHandleAuditRule System.Security.AccessControl.MutexAccessRule System.Security.AccessControl.MutexAuditRule System.Security.AccessControl.MutexSecurity System.Security.AccessControl.SemaphoreAccessRule System.Security.AccessControl.SemaphoreAuditRule System.Security.AccessControl.SemaphoreSecurity af7d2ae49c79bb279625de4e92f7f91f9fe94f5d When using NuGet 3.x this package requires at least version 3.4.

System.Xml.XDocument by: Microsoft

Provides the classes for Language-Integrated Query (LINQ) to Extensible Markup Language (XML). LINQ to XML is an in-memory XML programming interface that enables you to modify XML documents efficiently and easily. Commonly Used Types: System.Xml.Linq.XElement System.Xml.Linq.XAttribute System.Xml.Linq.XDocument System.Xml.Linq.XText System.Xml.Linq.XNode System.Xml.Linq.XContainer System.Xml.Linq.XComment System.Xml.Linq.XObject System.Xml.Linq.XProcessingInstruction System.Xml.Linq.XDocumentType - 1548494

Twilio by: Twilio

Twilio REST API helper library

Utf8Json by: neuecc

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