SoftCircuits.OrderedDictionary 3.0.0

The ID prefix of this package has been reserved for one of the owners of this package by Prefix Reserved
.NET 5.0 .NET Standard 2.0
dotnet add package SoftCircuits.OrderedDictionary --version 3.0.0
NuGet\Install-Package SoftCircuits.OrderedDictionary -Version 3.0.0
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="SoftCircuits.OrderedDictionary" Version="3.0.0" />
For projects that support PackageReference, copy this XML node into the project file to reference the package.
paket add SoftCircuits.OrderedDictionary --version 3.0.0
#r "nuget: SoftCircuits.OrderedDictionary, 3.0.0"
#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.
// Install SoftCircuits.OrderedDictionary as a Cake Addin
#addin nuget:?package=SoftCircuits.OrderedDictionary&version=3.0.0

// Install SoftCircuits.OrderedDictionary as a Cake Tool
#tool nuget:?package=SoftCircuits.OrderedDictionary&version=3.0.0


NuGet version (SoftCircuits.OrderedDictionary)

Install-Package SoftCircuits.OrderedDictionary


OrderedDictionary is a .NET library that implements an ordered dictionary. It provides all the functionality of Dictionary<TKey, TValue> but also maintains the items in an ordered list. Items can be added, removed and accessed by key or index. The class implements the IDictionary interface.


OrderedDictionary can be initialized used like any other dictionary. This includes initializing with index initializers.

OrderedDictionary<int, string> dictionary = new()
    [101] = "Bob Smith",
    [127] = "Gary Wilson",
    [134] = "Ann Carpenter",
    [187] = "Bill Jackson",
    [214] = "Cheryl Hansen",

Like a dictionary, items can by accessed by key. They can also be accessed using a 0-based index. Because it's possible for the key to be of type int, the ByIndex property is used to access an item using an index. This prevents any ambiguity between key and index values.

Assert.AreEqual("Gary Wilson", dictionary[127]);
Assert.AreEqual("Bill Jackson", dictionary.ByIndex[3]);

You can add items using the Add() method, and you can also insert them at a particular location.

OrderedDictionary<int, string> dictionary = new();

dictionary.Add(101, "Bob Smith");
dictionary.Add(127, "Gary Wilson");
dictionary.Add(187, "Bill Jackson");
dictionary.Add(214, "Cheryl Hansen");

dictionary.Insert(2, 134, "Add Carpenter");

Assert.AreEqual("Bob Smith", dictionary[101]);
Assert.AreEqual("Bob Smith", dictionary.ByIndex[0]);
Assert.AreEqual("Gary Wilson", dictionary[127]);
Assert.AreEqual("Gary Wilson", dictionary.ByIndex[1]);
Assert.AreEqual("Add Carpenter", dictionary[134]);
Assert.AreEqual("Add Carpenter", dictionary.ByIndex[2]);
Assert.AreEqual("Bill Jackson", dictionary[187]);
Assert.AreEqual("Bill Jackson", dictionary.ByIndex[3]);
Assert.AreEqual("Cheryl Hansen", dictionary[214]);
Assert.AreEqual("Cheryl Hansen", dictionary.ByIndex[4]);

Items can also be removed using either the key or index.

OrderedDictionary<int, string> dictionary = new()
    [101] = "Bob Smith",
    [127] = "Gary Wilson",
    [134] = "Ann Carpenter",
    [187] = "Bill Jackson",
    [214] = "Cheryl Hansen",

dictionary.RemoveAt(2); // Removes 187 - Bill Jackson

Assert.AreEqual(5 - 2, dictionary.Count);

You can iterate through an OrderedDictionary using `foreach.

foreach (KeyValuePair<int, string> item in dictionary)

To iterate the keys or values only, you can use the Keys or Values properies.

The library also defines the ToOrderedDictionary() extension method with several overloads for converting IEnumerable<>s to OrderedDictionary<>s.

Product Versions
.NET net5.0 net5.0-windows net6.0 net6.0-android net6.0-ios net6.0-maccatalyst net6.0-macos net6.0-tvos net6.0-windows net7.0 net7.0-android net7.0-ios net7.0-maccatalyst net7.0-macos net7.0-tvos net7.0-windows
.NET Core netcoreapp2.0 netcoreapp2.1 netcoreapp2.2 netcoreapp3.0 netcoreapp3.1
.NET Standard netstandard2.0 netstandard2.1
.NET Framework net461 net462 net463 net47 net471 net472 net48 net481
MonoAndroid monoandroid
MonoMac monomac
MonoTouch monotouch
Tizen tizen40 tizen60
Xamarin.iOS xamarinios
Xamarin.Mac xamarinmac
Xamarin.TVOS xamarintvos
Xamarin.WatchOS xamarinwatchos
Compatible target framework(s)
Additional computed target framework(s)
Learn more about Target Frameworks and .NET Standard.
  • .NETStandard 2.0

    • No dependencies.
  • net5.0

    • No dependencies.
  • net6.0

    • No dependencies.

NuGet packages

This package is not used by any NuGet packages.

GitHub repositories

This package is not used by any popular GitHub repositories.

Version Downloads Last updated
3.0.0 497 12/11/2022
2.1.0 3,831 12/7/2021
2.0.0 364 2/23/2021
1.0.2 392 3/9/2020
1.0.1 339 3/7/2020
1.0.0 433 3/6/2020

Added the ContainsValue() method; Minor code changes; Reworked documentation and unit tests.

Default enumerator now iterates the KeyValuePair<TKey, TValue>s rather than iterating the values. To iterate values, use the Values property. To iterate keys, use the Keys property.

The `Contains` method now looks for a matching KeyValuePair<TKey, TValue> using the default comparer, instead of looking for a matching key. An overload is provided that accepts a custom equality comparer.