ArrayList.ReadOnly Method (IList)

Returns a read-only IList wrapper.

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

public static IList ReadOnly (
	IList list
public static IList ReadOnly (
	IList list
public static function ReadOnly (
	list : IList
) : IList
Not applicable.



The IList to wrap.

Return Value

A read-only IList wrapper around list.

Exception typeCondition


list is a null reference (Nothing in Visual Basic).

To prevent any modifications to list, expose list only through this wrapper.

A collection that is read-only is simply a collection with a wrapper that prevents modifying the collection. If changes are made to the underlying collection, the read-only collection reflects those changes.

This method is an O(1) operation.

Windows 98, Windows Server 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0, 1.1, 1.0

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