System.Buffers by: Microsoft

Provides resource pooling of any type for performance-critical applications that allocate and deallocate objects frequently. Commonly Used Types: System.Buffers.ArrayPool<T> 7601f4f6225089ffb291dc7d58293c7bbf5c5d4f 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 a supported language. Commonly Used Types: System.CodeDom.CodeObject System.CodeDom.Compiler.CodeDomProvider Microsoft.CSharp.CSharpCodeProvider Microsoft.VisualBasic.VBCodeProvider 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.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.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.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.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.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.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.

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.Composition by: Microsoft

This package provides a version of the Managed Extensibility Framework (MEF) that is lightweight and specifically optimized for high throughput scenarios, such as the web. Commonly Used Types: System.Composition.ExportAttribute System.Composition.ImportAttribute System.Composition.Convention.ConventionBuilder System.Composition.Hosting.CompositionHost System.Composition.CompositionContext System.Composition.CompositionContextExtensions

System.Composition.AttributedModel by: Microsoft

Provides common attributes used by System.Composition types. Commonly Used Types: System.Composition.ExportAttribute System.Composition.ImportAttribute System.Composition.Convention.AttributedModelProvider

System.Composition.Convention by: Microsoft

Provides types that support using Managed Extensibility Framework with a convention-based configuration model. Commonly Used Types: System.Composition.Convention.ConventionBuilder System.Composition.Convention.ExportConventionBuilder System.Composition.Convention.ImportConventionBuilder System.Composition.Convention.PartConventionBuilder System.Composition.Convention.ParameterImportConventionBuilder

System.Composition.Hosting by: Microsoft

Provides Managed Extensibility Framework types that are useful to developers of extensible applications, or hosts. Commonly Used Types: System.Composition.Hosting.CompositionHost

System.Composition.Runtime by: Microsoft

Contains runtime components of the Managed Extensibility Framework. Commonly Used Types: System.Composition.CompositionContext

System.Composition.TypedParts by: Microsoft

Provides some extension methods for the Managed Extensibility Framework. Commonly Used Types: System.Composition.CompositionContextExtensions System.Composition.Hosting.ContainerConfiguration

System.Configuration.ConfigurationManager by: Microsoft

Provides types that support using XML configuration files (app.config). This package exists only to support migrating existing .NET Framework code that already uses System.Configuration. When writing new code, use another configuration system instead, such as Microsoft.Extensions.Configuration.

System.Data.DataSetExtensions by: Microsoft

Provides extensions to form LINQ expressions and method queries against DataTable objects. Commonly Used Types: System.Data.DataRowComparer System.Data.DataRowExtensions System.Data.DataTableExtensions System.Data.EnumerableRowCollection System.Data.EnumerableRowCollectionExtensions System.Data.OrderedEnumerableRowCollection System.Data.TypedTableBase System.Data.TypedTableBaseExtensions 30ab651fcb4354552bd4891619a0bdd81e0ebdbf When using NuGet 3.x this package requires at least version 3.4.

System.Diagnostics.DiagnosticSource by: Microsoft

Provides Classes that allow you to decouple code logging rich (unserializable) diagnostics/telemetry (e.g. framework) from code that consumes it (e.g. tools) Commonly Used Types: System.Diagnostics.DiagnosticListener System.Diagnostics.DiagnosticSource

System.Diagnostics.EventLog by: Microsoft

Provides the System.Diagnostics.EventLog class, which allows the applications to use the Windows event log service. Commonly Used Types: System.Diagnostics.EventLog