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ReadOnlyCollection(T).IList.Item Property

Gets or sets the element at the specified index.

Namespace:  System.Collections.ObjectModel
Assembly:  mscorlib (in mscorlib.dll)
private abstract Item : Object with get, set
private override Item : Object with get, set

Parameters

index
Type: System.Int32
The zero-based index of the element to get.

Property Value

Type: System.Object
The element at the specified index.

Implements

IList.Item(Int32)
ExceptionCondition
ArgumentOutOfRangeException

index is not a valid index in the IList.

NotSupportedException

Always thrown if the property is set.

This property provides the ability to access a specific element in the collection by using the following syntax: myCollection[index].

The C# language uses the this keyword to define the indexers instead of implementing the IList.Item property. Visual Basic implements IList.Item as a default property, which provides the same indexing functionality.

Retrieving the value of this property is an O(1) operation.

This member is an explicit interface member implementation. It can be used only when the ReadOnlyCollection(T) instance is cast to an IDisposable interface.

.NET Framework

Supported in: 4, 3.5, 3.0, 2.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Portable Class Library

Supported in: Portable Class Library

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

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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