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ListDictionary Constructor (IComparer)

Creates an empty ListDictionary using the specified comparer.

Namespace:  System.Collections.Specialized
Assembly:  System (in System.dll)

	IComparer^ comparer


Type: System.Collections::IComparer

The IComparer to use to determine whether two keys are equal.


nullptr to use the default comparer, which is each key's implementation of Object::Equals.

The comparer determines whether two keys are equal. Every key in a ListDictionary must be unique. The default comparer is the key's implementation of Object::Equals.

The custom comparer enables such scenarios as doing lookups with case-insensitive strings.

This constructor is an O(1) operation.

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

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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