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ArrayList.ReadOnly Method (IList)

Returns a read-only IList wrapper.

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

public static IList ReadOnly(
	IList list
)

Parameters

list
Type: System.Collections.IList

The IList to wrap.

Return Value

Type: System.Collections.IList
A read-only IList wrapper around list.

ExceptionCondition
ArgumentNullException

list is null.

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 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

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
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