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ReadOnlyCollection<T>.IList.Item Property

Microsoft Silverlight will reach end of support after October 2021. Learn more.

Gets or sets the element at the specified index.

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

Syntax

'Declaration
Private Property Item ( _
    index As Integer _
) As Object Implements IList.Item

Object IList.this[
    int index
] { 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]

Exceptions

Exception Condition
ArgumentOutOfRangeException

index is not a valid index in the IList.
NotSupportedException

Always thrown, if the property is set.

Remarks

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.

Version Information

Silverlight

Supported in: 5, 4, 3

Silverlight for Windows Phone

Supported in: Windows Phone OS 7.1, Windows Phone OS 7.0

XNA Framework

Supported in: Xbox 360, Windows Phone OS 7.0

Platforms

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.