Enumerable.ToHashSet Method

Definition

Overloads

ToHashSet<TSource>(IEnumerable<TSource>)

Source:
ToCollection.cs
Source:
ToCollection.cs
Source:
ToCollection.cs

Creates a HashSet<T> from an IEnumerable<T>.

public static System.Collections.Generic.HashSet<TSource> ToHashSet<TSource> (this System.Collections.Generic.IEnumerable<TSource> source);

Type Parameters

TSource

The type of the elements of source.

Parameters

source
IEnumerable<TSource>

An IEnumerable<T> to create a HashSet<T> from.

Returns

HashSet<TSource>

A HashSet<T> that contains values of type TSource selected from the input sequence.

Exceptions

source is null.

See also

Applies to

.NET 9 and other versions
Product Versions
.NET Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9
.NET Framework 4.7.2, 4.8, 4.8.1
.NET Standard 2.1

ToHashSet<TSource>(IEnumerable<TSource>, IEqualityComparer<TSource>)

Source:
ToCollection.cs
Source:
ToCollection.cs
Source:
ToCollection.cs

Creates a HashSet<T> from an IEnumerable<T> using the comparer to compare keys.

public static System.Collections.Generic.HashSet<TSource> ToHashSet<TSource> (this System.Collections.Generic.IEnumerable<TSource> source, System.Collections.Generic.IEqualityComparer<TSource>? comparer);
public static System.Collections.Generic.HashSet<TSource> ToHashSet<TSource> (this System.Collections.Generic.IEnumerable<TSource> source, System.Collections.Generic.IEqualityComparer<TSource> comparer);

Type Parameters

TSource

The type of the elements of source.

Parameters

source
IEnumerable<TSource>

An IEnumerable<T> to create a HashSet<T> from.

comparer
IEqualityComparer<TSource>

An IEqualityComparer<T> to compare keys.

Returns

HashSet<TSource>

A HashSet<T> that contains values of type TSource selected from the input sequence.

Exceptions

source is null.

See also

Applies to

.NET 9 and other versions
Product Versions
.NET Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9
.NET Framework 4.7.2, 4.8, 4.8.1
.NET Standard 2.1