System.Runtime by: Microsoft

Provides the fundamental primitives, classes and base classes that define commonly-used value and reference data types, events and event handlers, interfaces, attributes, and exceptions. This packages represents the core package, and provides the minimal set of types required to build a managed application. Commonly Used Types: System.Object System.Exception System.Int16 System.Int32 System.Int64 System.Enum System.String System.Char System.Boolean System.SByte System.Byte System.DateTime System.DateTimeOffset System.Single System.Double System.UInt16 System.UInt32 System.UInt64 System.IDisposable System.Uri When using NuGet 3.x this package requires at least version 3.4.

System.Runtime.Caching by: Microsoft

Provides classes to use caching facilities. Commonly Used Types: System.Runtime.Caching.CacheEntryChangeMonitor System.Runtime.Caching.CacheEntryRemovedArguments System.Runtime.Caching.CacheEntryUpdateArguments System.Runtime.Caching.CacheItem System.Runtime.Caching.CacheItemPolicy System.Runtime.Caching.ChangeMonitor System.Runtime.Caching.FileChangeMonitor System.Runtime.Caching.HostFileChangeMonitor System.Runtime.Caching.MemoryCache System.Runtime.Caching.ObjectCache When using NuGet 3.x this package requires at least version 3.4.

System.Runtime.CompilerServices.Unsafe by: Microsoft

Provides the System.Runtime.CompilerServices.Unsafe class, which provides generic, low-level functionality for manipulating pointers. Commonly Used Types: System.Runtime.CompilerServices.Unsafe When using NuGet 3.x this package requires at least version 3.4.

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 When using NuGet 3.x this package requires at least version 3.4.

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 When using NuGet 3.x this package requires at least version 3.4.

System.Runtime.InteropServices.NFloat.Internal by: Microsoft

Exposes additional NFloat APIs for Xamarin/Maui APIs from System.Runtime.InteropServices

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.Runtime.InteropServices.WindowsRuntime by: Microsoft

Provides classes that support interoperation between managed code and the Windows Runtime, and that enable the creation of Windows Runtime types with managed code. Commonly Used Types: System.Runtime.InteropServices.WindowsRuntime.WindowsRuntimeMarshal System.Runtime.InteropServices.WindowsRuntime.ReadOnlyArrayAttribute System.Runtime.InteropServices.WindowsRuntime.WriteOnlyArrayAttribute System.Runtime.InteropServices.WindowsRuntime.ReturnValueNameAttribute When using NuGet 3.x this package requires at least version 3.4.

System.Runtime.Numerics by: Microsoft

Provides the numeric types System.Numerics.BigInteger and System.Numerics.Complex, which complement the numeric primitives, such as System.Byte, System.Double and System.Int32. Commonly Used Types: System.Numerics.BigInteger System.Numerics.Complex When using NuGet 3.x this package requires at least version 3.4.

System.Runtime.Serialization.Primitives by: Microsoft

Provides common types, including System.Runtime.Serialization.DataContractAttribute, for libraries that support data contract serialization. Commonly Used Types: System.Runtime.Serialization.StreamingContext System.Runtime.Serialization.OnDeserializingAttribute System.Runtime.Serialization.OnDeserializedAttribute System.Runtime.Serialization.OnSerializingAttribute System.Runtime.Serialization.OnSerializedAttribute System.Runtime.Serialization.EnumMemberAttribute System.Runtime.Serialization.DataMemberAttribute System.Runtime.Serialization.DataContractAttribute System.Runtime.Serialization.IgnoreDataMemberAttribute System.Runtime.Serialization.SerializationException When using NuGet 3.x this package requires at least version 3.4.

System.Runtime.Serialization.Xml by: Microsoft

Provides classes for serializing objects to the Extensible Markup Language (XML) and deserializing XML data to objects. Commonly Used Types: System.Runtime.Serialization.DataContractSerializer System.Runtime.Serialization.XmlObjectSerializer System.Runtime.Serialization.InvalidDataContractException System.Xml.XmlDictionaryReader System.Xml.XmlDictionaryWriter System.Xml.XmlDictionaryString System.Xml.UniqueId System.Xml.XmlDictionaryReaderQuotas System.Runtime.Serialization.DataContractResolver System.Xml.IXmlDictionary When using NuGet 3.x this package requires at least version 3.4.

System.Security.Principal by: Microsoft

Provides the base interfaces for principal and identity objects that represents the security context under which code is running. Commonly Used Types: System.Security.Principal.IPrincipal System.Security.Principal.IIdentity System.Security.Principal.TokenImpersonationLevel When using NuGet 3.x this package requires at least version 3.4.

System.ServiceModel.Duplex by: Microsoft

Provides the types that permit 2-way ("duplex") exchanges of messages.

System.ServiceModel.Http by: Microsoft

Provides the types that permit SOAP messages to be exchanged using Http (example: BasicHttpBinding).

System.ServiceModel.NetTcp by: Microsoft

Provides the types that permit SOAP messages to be exchanged using TCP (example: NetTcpBinding).

System.ServiceModel.Primitives by: Microsoft

Provides the common types used by all of the WCF libraries.

System.ServiceModel.Security by: Microsoft

Provides the types that support additional security features.

System.Spatial by: Microsoft Corporation

Contains classes and methods that facilitate geography and geometry spatial operations. Targets .NET 4.0, Silverlight 4.0 or .NET Portable Lib with support for .NET 4.0, SL 5.0, Win Phone 8, Win Phone 8.1, and Win 8. Localized for CHS, CHT, DEU, ESN, FRA, ITA, JPN, KOR and RUS.

System.Text.Encoding by: Microsoft

Provides base abstract encoding classes for converting blocks of characters to and from blocks of bytes. Commonly Used Types: System.Text.Encoding System.Text.DecoderFallbackException System.Text.Decoder System.Text.EncoderFallbackException System.Text.Encoder System.Text.EncoderFallback System.Text.EncoderFallbackBuffer System.Text.DecoderFallback System.Text.DecoderFallbackBuffer System.Text.DecoderExceptionFallback When using NuGet 3.x this package requires at least version 3.4.

System.Text.Encoding.Extensions by: Microsoft

Provides support for specific encodings, including ASCII, UTF-7, UTF-8, UTF-16, and UTF-32. Commonly Used Types: System.Text.UTF8Encoding System.Text.UnicodeEncoding System.Text.ASCIIEncoding System.Text.UTF7Encoding System.Text.UTF32Encoding When using NuGet 3.x this package requires at least version 3.4.