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ListDictionary Constructor (IComparer)

Creates an empty ListDictionary using the specified comparer.

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

public ListDictionary(
	IComparer comparer


Type: System.Collections.IComparer

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


null 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.

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98, Windows CE, Windows Mobile for Smartphone, Windows Mobile for Pocket PC, Xbox 360, Zune

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

.NET Framework

Supported in: 3.5, 3.0, 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 3.5, 2.0, 1.0

XNA Framework

Supported in: 3.0, 2.0, 1.0