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

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

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

System.ComponentModel.Annotations by: Microsoft

Provides attributes that are used to define metadata for objects used as data sources.

System.ComponentModel.EventBasedAsync by: Microsoft

Provides support classes and delegates for the event-based asynchronous pattern. Developers should prefer the classes in the System.Threading.Tasks package. Commonly Used Types: System.ComponentModel.AsyncCompletedEventArgs System.ComponentModel.AsyncCompletedEventHandler System.ComponentModel.ProgressChangedEventArgs System.ComponentModel.ProgressChangedEventHandler System.ComponentModel.AsyncOperation System.ComponentModel.AsyncOperationManager

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

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

System.Composition by: Microsoft

This packages 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 the foundational attributes that allow you to declare parts for composition, such as imports, exports, and metadata with the Managed Extensibility Framework (MEF).

System.Composition.Convention by: Microsoft

Provides types that support using Managed Extensibility Framework (MEF) with a convention-based configuration model.

System.Composition.Hosting by: Microsoft

Provides Managed Extensibility Framework (MEF) types that are useful to developers of extensible applications, or hosts.

System.Composition.Runtime by: Microsoft

Contains runtime components of the Managed Extensibility Framework (MEF).

System.Composition.TypedParts by: Microsoft

Provides container configuration and some extension methods for the Managed Extensibility Framework (MEF).

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.Console by: Microsoft

Provides the System.Console class, which represents the standard input, output and error streams for console applications. Commonly Used Types: System.Console System.ConsoleColor

System.Data.Common by: Microsoft

Provides the base abstract classes, including System.Data.DbConnection and System.Data.DbCommand, for all data providers. Commonly Used Types: System.DBNull System.Data.Common.DbConnection System.Data.Common.DbException System.Data.Common.DbParameter System.Data.DbType System.Data.Common.DbDataReader System.Data.Common.DbCommand System.Data.Common.DbTransaction System.Data.Common.DbParameterCollection System.Data.Common.DbProviderFactory

System.Data.SqlClient by: Microsoft

Provides the data provider for SQL Server. These classes provide access to versions of SQL Server and encapsulate database-specific protocols, including tabular data stream (TDS) Commonly Used Types: System.Data.SqlClient.SqlConnection System.Data.SqlClient.SqlException System.Data.SqlClient.SqlParameter System.Data.SqlDbType System.Data.SqlClient.SqlDataReader System.Data.SqlClient.SqlCommand System.Data.SqlClient.SqlTransaction System.Data.SqlClient.SqlParameterCollection System.Data.SqlClient.SqlClientFactory

System.Diagnostics.Contracts by: Microsoft

Provides static classes for representing program contracts such as preconditions, postconditions, and invariants. Commonly Used Types: System.Diagnostics.Contracts.Contract System.Diagnostics.Contracts.ContractClassAttribute System.Diagnostics.Contracts.ContractClassForAttribute System.Diagnostics.Contracts.ContractFailureKind System.Runtime.CompilerServices.ContractHelper System.Diagnostics.Contracts.ContractInvariantMethodAttribute System.Diagnostics.Contracts.PureAttribute System.Diagnostics.Contracts.ContractArgumentValidatorAttribute System.Diagnostics.Contracts.ContractVerificationAttribute System.Diagnostics.Contracts.ContractOptionAttribute

System.Diagnostics.Debug by: Microsoft

Provides classes and attributes that allows basic interaction with a debugger. Commonly Used Types: System.Diagnostics.Debug System.Diagnostics.DebuggerStepThroughAttribute System.Diagnostics.Debugger System.Diagnostics.DebuggerDisplayAttribute System.Diagnostics.DebuggerBrowsableAttribute System.Diagnostics.DebuggerBrowsableState System.Diagnostics.DebuggerHiddenAttribute System.Diagnostics.DebuggerNonUserCodeAttribute System.Diagnostics.DebuggerTypeProxyAttribute

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