HashSet<T> Constructor (IEqualityComparer<T>)

Initializes a new instance of the HashSet<T> class that is empty and uses the specified equality comparer for the set type.

Namespace:  System.Collections.Generic
Assembly:  System.Core (in System.Core.dll)

public HashSet(
	IEqualityComparer<T> comparer
)

Parameters

comparer
Type: System.Collections.Generic.IEqualityComparer<T>

The IEqualityComparer<T> implementation to use when comparing values in the set, or null to use the default EqualityComparer<T> implementation for the set type.

The capacity of a HashSet<T> object is the number of elements that the object can hold. A HashSet<T> object's capacity automatically increases as elements are added to the object.

This constructor is an O(1) operation.

.NET Framework

Supported in: 4.5.2, 4.5.1, 4.5, 4, 3.5

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Portable Class Library

Supported in: Portable Class Library

.NET for Windows Store apps

Supported in: Windows 8

.NET for Windows Phone apps

Supported in: Windows Phone 8.1, Windows Phone 8, Silverlight 8.1

Windows Phone 8.1, Windows Phone 8, Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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