System.Collections.Immutable 9.0.4

Prefix Reserved
.NET 8.0 This package targets .NET 8.0. The package is compatible with this framework or higher. .NET Standard 2.0 This package targets .NET Standard 2.0. The package is compatible with this framework or higher. .NET Framework 4.6.2 This package targets .NET Framework 4.6.2. The package is compatible with this framework or higher.
There is a newer prerelease version of this package available.
See the version list below for details. 
dotnet add package System.Collections.Immutable --version 9.0.4
                    


                    

                
NuGet\Install-Package System.Collections.Immutable -Version 9.0.4
This command is intended to be used within the Package Manager Console in Visual Studio, as it uses the NuGet module's version of Install-Package. 
<PackageReference Include="System.Collections.Immutable" Version="9.0.4" />
For projects that support PackageReference, copy this XML node into the project file to reference the package. 
<PackageVersion Include="System.Collections.Immutable" Version="9.0.4" />
                    


                            Directory.Packages.props
                        

                    

                
<PackageReference Include="System.Collections.Immutable" />
                    


                            Project file
For projects that support Central Package Management (CPM), copy this XML node into the solution Directory.Packages.props file to version the package. 
paket add System.Collections.Immutable --version 9.0.4
                    


                    

                
#r "nuget: System.Collections.Immutable, 9.0.4"
#r directive can be used in F# Interactive and Polyglot Notebooks. Copy this into the interactive tool or source code of the script to reference the package. 
#addin nuget:?package=System.Collections.Immutable&version=9.0.4
                    


                            Install System.Collections.Immutable as a Cake Addin
                        

                    

                
#tool nuget:?package=System.Collections.Immutable&version=9.0.4
                    


                            Install System.Collections.Immutable as a Cake Tool

About

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.

How to Use

using System.Collections.Immutable;

// Create immutable set of strings
ImmutableHashSet<string> colors = ImmutableHashSet.Create("Red", "Green", "Blue");

// Create a new set by adding and removing items from the original set
ImmutableHashSet<string> colorsModified = colors.Remove("Red").Add("Orange");

foreach (string s in colorsModified)
{
    Console.WriteLine(s);
}

/* Example output:
 Blue
 Green
 Orange
 */

Main Types

The main types provided by this library are:

  • 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>
  • System.Collections.Frozen.FrozenDictionary
  • System.Collections.Frozen.FrozenDictionary<TKey, TValue>
  • System.Collections.Frozen.FrozenSet
  • System.Collections.Frozen.FrozenSet<T>

Additional Documentation

Feedback & Contributing

System.Collections.Immutable is released as open source under the MIT license. Bug reports and contributions are welcome at the GitHub repository.

Product Compatible and additional computed target framework versions.
.NET net5.0 was computed.  net5.0-windows was computed.  net6.0 was computed.  net6.0-android was computed.  net6.0-ios was computed.  net6.0-maccatalyst was computed.  net6.0-macos was computed.  net6.0-tvos was computed.  net6.0-windows was computed.  net7.0 was computed.  net7.0-android was computed.  net7.0-ios was computed.  net7.0-maccatalyst was computed.  net7.0-macos was computed.  net7.0-tvos was computed.  net7.0-windows was computed.  net8.0 is compatible.  net8.0-android was computed.  net8.0-browser was computed.  net8.0-ios was computed.  net8.0-maccatalyst was computed.  net8.0-macos was computed.  net8.0-tvos was computed.  net8.0-windows was computed.  net9.0 is compatible.  net9.0-android was computed.  net9.0-browser was computed.  net9.0-ios was computed.  net9.0-maccatalyst was computed.  net9.0-macos was computed.  net9.0-tvos was computed.  net9.0-windows was computed. 
.NET Core netcoreapp2.0 was computed.  netcoreapp2.1 was computed.  netcoreapp2.2 was computed.  netcoreapp3.0 was computed.  netcoreapp3.1 was computed. 
.NET Standard netstandard2.0 is compatible.  netstandard2.1 was computed. 
.NET Framework net461 was computed.  net462 is compatible.  net463 was computed.  net47 was computed.  net471 was computed.  net472 was computed.  net48 was computed.  net481 was computed. 
MonoAndroid monoandroid was computed. 
MonoMac monomac was computed. 
MonoTouch monotouch was computed. 
Tizen tizen40 was computed.  tizen60 was computed. 
Xamarin.iOS xamarinios was computed. 
Xamarin.Mac xamarinmac was computed. 
Xamarin.TVOS xamarintvos was computed. 
Xamarin.WatchOS xamarinwatchos was computed. 
Compatible target framework(s)
Included target framework(s) (in package)
Learn more about Target Frameworks and .NET Standard.

NuGet packages (2.2K)

Showing the top 5 NuGet packages that depend on System.Collections.Immutable:

Package Downloads
System.Reflection.Metadata

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.
Microsoft.CodeAnalysis.Common

A shared package used by the Microsoft .NET Compiler Platform ("Roslyn"). Do not install this package manually, it will be added as a prerequisite by other packages that require it. More details at https://aka.ms/roslyn-packages This package was built from the source at https://github.com/dotnet/roslyn/commit/75e79dace86b274327a1afe479228d82a06051a4.
Microsoft.CodeAnalysis.CSharp

.NET Compiler Platform ("Roslyn") support for C#, Microsoft.CodeAnalysis.CSharp.dll. More details at https://aka.ms/roslyn-packages This package was built from the source at https://github.com/dotnet/roslyn/commit/75e79dace86b274327a1afe479228d82a06051a4.
Humanizer.Core

Humanizer core package that contains the library and the neutral language (English) resources
Microsoft.CodeAnalysis.Workspaces.Common

A shared package used by the .NET Compiler Platform ("Roslyn") including support for analyzing projects and solutions. Do not install this package manually, it will be added as a prerequisite by other packages that require it. More details at https://aka.ms/roslyn-packages This package was built from the source at https://github.com/dotnet/roslyn/commit/75e79dace86b274327a1afe479228d82a06051a4.

GitHub repositories (513)

Showing the top 20 popular GitHub repositories that depend on System.Collections.Immutable:

Repository Stars
icsharpcode/ILSpy
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abpframework/abp
Open-source web application framework for ASP.NET Core! Offers an opinionated architecture to build enterprise software solutions with best practices on top of the .NET. Provides the fundamental infrastructure, cross-cutting-concern implementations, startup templates, application modules, UI themes, tooling and documentation.
aspnetboilerplate/aspnetboilerplate
ASP.NET Boilerplate - Web Application Framework
JamesNK/Newtonsoft.Json
Json.NET is a popular high-performance JSON framework for .NET
chocolatey/choco
Chocolatey - the package manager for Windows
dotnet/orleans
Cloud Native application framework for .NET
mRemoteNG/mRemoteNG
mRemoteNG is the next generation of mRemote, open source, tabbed, multi-protocol, remote connections manager.
dotnet/machinelearning
ML.NET is an open source and cross-platform machine learning framework for .NET.
reactiveui/refit
The automatic type-safe REST library for .NET Core, Xamarin and .NET. Heavily inspired by Square's Retrofit library, Refit turns your REST API into a live interface.
Humanizr/Humanizer
Humanizer meets all your .NET needs for manipulating and displaying strings, enums, dates, times, timespans, numbers and quantities
gitextensions/gitextensions
Git Extensions is a standalone UI tool for managing git repositories. It also integrates with Windows Explorer and Microsoft Visual Studio (2015/2017/2019).
neuecc/UniRx
Reactive Extensions for Unity
NancyFx/Nancy
Lightweight, low-ceremony, framework for building HTTP based services on .Net and Mono
stride3d/stride
Stride (formerly Xenko), a free and open-source cross-platform C# game engine.
louthy/language-ext
C# pure functional programming framework - come and get declarative!
MessagePack-CSharp/MessagePack-CSharp
Extremely Fast MessagePack Serializer for C#(.NET, .NET Core, Unity, Xamarin). / msgpack.org[C#]
StackExchange/StackExchange.Redis
General purpose redis client
ldqk/Masuit.Tools
全龄段友好的C#万能工具库，码数吐司库，包含一些常用的操作类，大都是静态类，加密解密，反射操作，权重随机筛选算法，分布式短id，表达式树，linq扩展，文件压缩，多线程下载，硬件信息，字符串扩展方法，日期时间扩展操作，中国农历，大文件拷贝，图像裁剪，验证码，断点续传，集合扩展、Excel导出等常用封装。诸多功能集一身，代码量不到2MB！
ServiceStack/ServiceStack
Thoughtfully architected, obscenely fast, thoroughly enjoyable web services for all
Version Downloads Last updated
10.0.0-preview.3.25171.5 255 4/10/2025
10.0.0-preview.2.25163.2 1,696 3/18/2025
10.0.0-preview.1.25080.5 2,437 2/25/2025
9.0.4 19,615 4/8/2025
9.0.3 373,022 3/11/2025
9.0.2 530,321 2/11/2025
9.0.1 1,253,254 1/14/2025
9.0.0 2,237,685 11/12/2024
9.0.0-rc.2.24473.5 20,898 10/8/2024
9.0.0-rc.1.24431.7 21,795 9/10/2024
9.0.0-preview.7.24405.7 6,721 8/13/2024
9.0.0-preview.6.24327.7 6,999 7/9/2024
9.0.0-preview.5.24306.7 4,803 6/11/2024
9.0.0-preview.4.24266.19 2,812 5/21/2024
9.0.0-preview.3.24172.9 4,043 4/11/2024
9.0.0-preview.2.24128.5 8,632 3/12/2024
9.0.0-preview.1.24080.9 18,157 2/13/2024
8.0.0 74,243,545 11/14/2023
8.0.0-rc.2.23479.6 834,064 10/10/2023
8.0.0-rc.1.23419.4 24,483 9/12/2023
8.0.0-preview.7.23375.6 15,100 8/8/2023
8.0.0-preview.6.23329.7 10,396 7/11/2023
8.0.0-preview.5.23280.8 11,949 6/13/2023
8.0.0-preview.4.23259.5 4,150 5/16/2023
8.0.0-preview.3.23174.8 5,919 4/11/2023
8.0.0-preview.2.23128.3 10,770 3/14/2023
8.0.0-preview.1.23110.8 4,256 2/21/2023
7.0.0 109,502,864 11/7/2022
7.0.0-rc.2.22472.3 59,184 10/11/2022
7.0.0-rc.1.22426.10 16,343 9/14/2022
7.0.0-preview.7.22375.6 8,353 8/9/2022
7.0.0-preview.6.22324.4 8,146 7/12/2022
7.0.0-preview.5.22301.12 2,656 6/14/2022
7.0.0-preview.4.22229.4 16,604 5/10/2022
7.0.0-preview.3.22175.4 123,493 4/13/2022
7.0.0-preview.2.22152.2 87,825 3/14/2022
7.0.0-preview.1.22076.8 75,704 2/17/2022
6.0.1 1,115,437 11/12/2024
6.0.0 400,613,045 11/8/2021
6.0.0-rc.2.21480.5 329,395 10/12/2021
6.0.0-rc.1.21451.13 265,449 9/14/2021
6.0.0-preview.7.21377.19 129,393 8/10/2021
6.0.0-preview.6.21352.12 42,499 7/14/2021
6.0.0-preview.5.21301.5 207,263 6/15/2021
6.0.0-preview.4.21253.7 79,206 5/24/2021
6.0.0-preview.3.21201.4 101,838 4/8/2021
6.0.0-preview.2.21154.6 98,883 3/11/2021
6.0.0-preview.1.21102.12 102,774 2/12/2021
5.0.0 371,262,074 11/9/2020 5.0.0 is deprecated because it is no longer maintained.
5.0.0-rc.2.20475.5 392,735 10/13/2020
5.0.0-rc.1.20451.14 327,730 9/14/2020
5.0.0-preview.8.20407.11 493,229 8/25/2020
5.0.0-preview.7.20364.11 118,709 7/21/2020
5.0.0-preview.6.20305.6 4,497 6/25/2020
5.0.0-preview.5.20278.1 6,436 6/10/2020
5.0.0-preview.4.20251.6 6,427 5/18/2020
5.0.0-preview.3.20214.6 148,899 4/23/2020
5.0.0-preview.2.20160.6 90,461 4/2/2020
5.0.0-preview.1.20120.5 14,767 3/16/2020
1.7.1 252,708,698 5/12/2020
1.7.0 221,596,406 12/3/2019
1.7.0-preview3.19551.4 192,639 11/13/2019
1.7.0-preview2.19523.17 34,646 11/1/2019
1.7.0-preview1.19504.10 776,401 10/15/2019
1.6.0 37,543,210 9/23/2019
1.6.0-rc1.19456.4 50,548 9/16/2019
1.6.0-preview9.19421.4 1,455,274 9/4/2019
1.6.0-preview9.19416.11 2,143 9/4/2019
1.6.0-preview8.19405.3 403,082 8/13/2019
1.6.0-preview7.19362.9 96,506 7/23/2019
1.6.0-preview6.19303.8 180,391 6/12/2019
1.6.0-preview6.19264.9 2,469 9/4/2019
1.6.0-preview5.19224.8 672,585 5/6/2019
1.6.0-preview4.19212.13 33,028 4/18/2019
1.6.0-preview3.19128.7 219,299 3/6/2019
1.6.0-preview.19073.11 44,407 1/29/2019
1.6.0-preview.18571.3 72,631 12/3/2018
1.5.0 327,916,583 5/29/2018
1.5.0-rc1 380,383 5/6/2018
1.5.0-preview2-26406-04 295,601 4/10/2018
1.5.0-preview1-26216-02 572,189 2/26/2018
1.4.0 157,409,467 8/11/2017
1.4.0-preview2-25405-01 14,930 6/27/2017
1.4.0-preview1-25305-02 19,165 5/9/2017
1.3.1 209,958,085 1/3/2017
1.3.0 259,581,644 11/15/2016
1.3.0-preview1-24530-04 138,854 10/24/2016
1.2.0 339,317,556 6/27/2016
1.2.0-rc2-24027 11,535,831 5/16/2016
1.1.38-beta-23516 37,828 11/18/2015
1.1.38-beta-23409 7,751 10/15/2015
1.1.38-beta-23225 149,747 9/1/2015
1.1.37 6,224,588 7/29/2015
1.1.37-beta-23109 23,053 7/27/2015
1.1.37-beta-23019 7,534 6/30/2015
1.1.36 9,777,285 5/11/2015
1.1.34-rc 33,212 3/6/2015
1.1.33-beta 677,692 12/10/2014
1.1.32-beta 260,149 10/10/2014

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