System.Collections 4.3.0

Provides classes that define generic collections, which allow developers to create strongly typed collections that provide better type safety and performance than non-generic strongly typed collections. Commonly Used Types: System.Collections.Generic.List<T> System.Collections.Generic.Dictionary<TKey, TValue> System.Collections.Generic.Queue<T> System.Collections.Generic.Stack<T> System.Collections.Generic.HashSet<T> System.Collections.Generic.LinkedList<T> System.Collections.Generic.EqualityComparer<T> System.Collections.Generic.Comparer<T> System.Collections.Generic.SortedDictionary<TKey, TValue> When using NuGet 3.x this package requires at least version 3.4.

Showing the top 20 packages that depend on System.Collections.

Packages Downloads
System.Diagnostics.DiagnosticSource
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 8321c729934c0f8be754953439b88e6e1c120c24
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System.Security.Principal.Windows
Provides classes for retrieving the current Windows user and for interacting with Windows users and groups. Commonly Used Types: System.Security.Principal.WindowsIdentity System.Security.Principal.SecurityIdentifier System.Security.Principal.NTAccount System.Security.Principal.WindowsPrincipal System.Security.Principal.IdentityReference System.Security.Principal.IdentityNotMappedException System.Security.Principal.WindowsBuiltInRole System.Security.Principal.WellKnownSidType When using NuGet 3.x this package requires at least version 3.4.
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Microsoft.CSharp
Provides support for compilation and code generation, including dynamic, using the C# language. Commonly Used Types: Microsoft.CSharp.RuntimeBinder.Binder Microsoft.CSharp.RuntimeBinder.RuntimeBinderException Microsoft.CSharp.RuntimeBinder.CSharpArgumentInfo Microsoft.CSharp.RuntimeBinder.CSharpArgumentInfoFlags Microsoft.CSharp.RuntimeBinder.CSharpBinderFlags When using NuGet 3.x this package requires at least version 3.4.
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System.Collections.Immutable
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. Commonly Used Types: System.Collections.Immutable.ImmutableArray System.Collections.Immutable.ImmutableArray<T> System.Collections.Immutable.ImmutableDictionary System.Collections.Immutable.ImmutableDictionary<TKey,TValue> System.Collections.Immutable.ImmutableHashSet System.Collections.Immutable.ImmutableHashSet<T> System.Collections.Immutable.ImmutableList System.Collections.Immutable.ImmutableList<T> System.Collections.Immutable.ImmutableQueue System.Collections.Immutable.ImmutableQueue<T> System.Collections.Immutable.ImmutableSortedDictionary System.Collections.Immutable.ImmutableSortedDictionary<TKey,TValue> System.Collections.Immutable.ImmutableSortedSet System.Collections.Immutable.ImmutableSortedSet<T> System.Collections.Immutable.ImmutableStack System.Collections.Immutable.ImmutableStack<T>
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System.Security.Principal.Windows
Provides classes for retrieving the current Windows user and for interacting with Windows users and groups. Commonly Used Types: System.Security.Principal.WindowsIdentity System.Security.Principal.SecurityIdentifier System.Security.Principal.NTAccount System.Security.Principal.WindowsPrincipal System.Security.Principal.IdentityReference System.Security.Principal.IdentityNotMappedException System.Security.Principal.WindowsBuiltInRole System.Security.Principal.WellKnownSidType When using NuGet 3.x this package requires at least version 3.4.
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System.Diagnostics.DiagnosticSource
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 When using NuGet 3.x this package requires at least version 3.4.
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System.Security.Principal.Windows
Provides classes for retrieving the current Windows user and for interacting with Windows users and groups. Commonly Used Types: System.Security.Principal.WindowsIdentity System.Security.Principal.SecurityIdentifier System.Security.Principal.NTAccount System.Security.Principal.WindowsPrincipal System.Security.Principal.IdentityReference System.Security.Principal.IdentityNotMappedException System.Security.Principal.WindowsBuiltInRole System.Security.Principal.WellKnownSidType 30ab651fcb4354552bd4891619a0bdd81e0ebdbf When using NuGet 3.x this package requires at least version 3.4.
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System.Reflection.Metadata
This packages provides a low-level .NET (ECMA-335) metadata reader. 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. Commonly Used Types: System.Reflection.Metadata.MetadataReader System.Reflection.PortableExecutable.PEReader
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System.Linq.Expressions
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.
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System.Dynamic.Runtime
Provides classes and interfaces that support the Dynamic Language Runtime (DLR). Commonly Used Types: System.Runtime.CompilerServices.CallSite System.Runtime.CompilerServices.CallSite<T> System.Dynamic.IDynamicMetaObjectProvider System.Dynamic.DynamicMetaObject System.Dynamic.SetMemberBinder System.Dynamic.GetMemberBinder System.Dynamic.ExpandoObject System.Dynamic.DynamicObject System.Runtime.CompilerServices.CallSiteBinder System.Runtime.CompilerServices.ConditionalWeakTable<TKey, TValue> When using NuGet 3.x this package requires at least version 3.4.
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System.ObjectModel
Provides types and interfaces that allow the creation of observable types that provide notifications to clients when changes are made to it. Commonly Used Types: System.ComponentModel.INotifyPropertyChanged System.Collections.ObjectModel.ObservableCollection<T> System.ComponentModel.PropertyChangedEventHandler System.Windows.Input.ICommand System.Collections.Specialized.INotifyCollectionChanged System.Collections.Specialized.NotifyCollectionChangedEventArgs System.Collections.Specialized.NotifyCollectionChangedEventHandler System.Collections.ObjectModel.KeyedCollection<TKey, TItem> System.ComponentModel.PropertyChangedEventArgs System.Collections.ObjectModel.ReadOnlyDictionary<TKey, TValue> When using NuGet 3.x this package requires at least version 3.4.
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System.Xml.XDocument
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 When using NuGet 3.x this package requires at least version 3.4.
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System.Linq
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.
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System.AppContext
Provides the System.AppContext class, which allows access to the BaseDirectory property and other application specific data. Commonly Used Types: System.AppContext When using NuGet 3.x this package requires at least version 3.4.
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System.Threading.Tasks.Extensions
Provides additional types that simplify the work of writing concurrent and asynchronous code. Commonly Used Types: System.Threading.Tasks.ValueTask<TResult>
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System.IO.Compression
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.
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System.Threading.Tasks.Extensions
Provides additional types that simplify the work of writing concurrent and asynchronous code. Commonly Used Types: System.Threading.Tasks.ValueTask<TResult> 7601f4f6225089ffb291dc7d58293c7bbf5c5d4f
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System.Data.Common
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 When using NuGet 3.x this package requires at least version 3.4.
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System.Collections.Concurrent
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.
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System.Security.Principal.Windows
Provides classes for retrieving the current Windows user and for interacting with Windows users and groups. Commonly Used Types: System.Security.Principal.WindowsIdentity System.Security.Principal.SecurityIdentifier System.Security.Principal.NTAccount System.Security.Principal.WindowsPrincipal System.Security.Principal.IdentityReference System.Security.Principal.IdentityNotMappedException System.Security.Principal.WindowsBuiltInRole System.Security.Principal.WellKnownSidType When using NuGet 3.x this package requires at least version 3.4.
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MonoAndroid 1.0

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Xamarin.WatchOS 1.0

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Xamarin.TVOS 1.0

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Xamarin.Mac 2.0

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Xamarin.iOS 1.0

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WindowsPhone 8.0

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Windows 8.0

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.NETPortable 0.0

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.NET Standard 1.3

WindowsPhoneApp 8.1

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.NET Standard 1.0

.NETCore 5.0

.NET Framework 4.5

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MonoTouch 1.0

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Version Downloads Last updated
4.3.0 46 07/07/2025
4.0.11 26 08/02/2025