Tedd.HashSetExtensions 1.0.2

dotnet add package Tedd.HashSetExtensions --version 1.0.2
NuGet\Install-Package Tedd.HashSetExtensions -Version 1.0.2
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="Tedd.HashSetExtensions" Version="1.0.2" />
For projects that support PackageReference, copy this XML node into the project file to reference the package.
paket add Tedd.HashSetExtensions --version 1.0.2
#r "nuget: Tedd.HashSetExtensions, 1.0.2"
#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 Tedd.HashSetExtensions as a Cake Addin
#addin nuget:?package=Tedd.HashSetExtensions&version=1.0.2

// Install Tedd.HashSetExtensions as a Cake Tool
#tool nuget:?package=Tedd.HashSetExtensions&version=1.0.2


.Net extension methods for ToHashSet<T>().<br /> All methods implemented with and without both selector and comparer. Special handling of Array and List to avoid enumeration overhead. In line with how ToDictionary is implemented in .Net source code.


All methods supports selector. A selector is used to pick or transform the object before it is added to the hash.

Selector example

var dic = new Dictionary<string, int>();
dic.Add("A", 1);
dic.Add("B", 2);

// A dictionary consists of KeyValuePair and we pick the Key portion of that for our HashSet
var hashSet = dic.ToHashSet(s => s.Key);

dic.Add("CC", 2);
// Or we can have more complex logic
var hashSet2 = dic.ToHashSet(s => {
	if (s.Key == "CC")
		return "C";
	return s.Key;



var list = new List<string>();
var hashSet = list.ToHashSet(); // No selector needed
var thisIsTrue = hashSet.Contains("A");
var thisIsFalse = hashSet.Contains("C");

// Add B again
var hashSet2 = list.ToHashSet(s => s); // Using selector
// HashSet only cointains 2 items because duplicates are ignored
var thisIsTwo = hashSet2.Count;

ienumerable.ToHashSet(selector, comparer)

var list = new List<string>();
var hashSet = list.ToHashSet(s => s, StringComparer.InvariantCultureIgnoreCase);
// HashSet now contains: a, b

var thisIsTrue = hashSet.Contains("a");
var thisIsAlsoTrue = hashSet.Contains("A");


var list = new List<string>();
var hashSet = list.ToHashSet(s => s);
// HashSet now contains: A, B, C

var otherList = new List<string>();

var thisIsTrue = hashSet.ContainsRange(otherList);


var list1 = new List<string>();
var hashSet = list1.ToHashSet(s => s);
// HashSet now contains: A, B

var list2 = new List<string>();
// HashSet now contains: A, B, C, D

var thisIsTrue = hashSet.Contains("D");


var list1 = new List<string>();
var hashSet = list1.ToHashSet();
// HashSet now contains: A, B, C, D

var list2 = new List<string>();
// HashSet now contains: B, C

var thisIsFalse = hashSet.Contains("A");
var thisIsAlsoFalse = hashSet.Contains("B");
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 was computed.  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. 
.NET Core netcoreapp2.0 is compatible.  netcoreapp2.1 is compatible.  netcoreapp2.2 was computed.  netcoreapp3.0 is compatible.  netcoreapp3.1 is compatible. 
.NET Standard netstandard2.0 is compatible.  netstandard2.1 was computed. 
.NET Framework net461 is compatible.  net462 is compatible.  net463 was computed.  net47 is compatible.  net471 is compatible.  net472 is compatible.  net48 is compatible.  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.
  • .NETCoreApp 2.0

    • No dependencies.
  • .NETCoreApp 2.1

    • No dependencies.
  • .NETCoreApp 3.0

    • No dependencies.
  • .NETCoreApp 3.1

    • No dependencies.
  • .NETFramework 4.6.1

    • No dependencies.
  • .NETFramework 4.6.2

    • No dependencies.
  • .NETFramework 4.7

    • No dependencies.
  • .NETFramework 4.7.1

    • No dependencies.
  • .NETFramework 4.7.2

    • No dependencies.
  • .NETFramework 4.8

    • No dependencies.
  • .NETStandard 2.0

    • No dependencies.

NuGet packages (1)

Showing the top 1 NuGet packages that depend on Tedd.HashSetExtensions:

Package Downloads

Extensions to Dictionary<TKey, TValue>

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Version Downloads Last updated
1.0.2 2,056 2/15/2020
1.0.1 1,033 2/14/2020
1.0.0 915 2/14/2020

Contains for array, list and ienumerable