Collection<T>.IList.Item Property

Gets or sets the element at the specified index.

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

Object IList.this[
	int index
] { get; set; }

Parameters

index
Type: System.Int32

The zero-based index of the element to get or set.

Property Value

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

Implements

IList.Item

ExceptionCondition
ArgumentOutOfRangeException

index is not a valid index in the IList.

ArgumentException

The property is set and value is of a type that is not assignable to the IList.

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; setting the property is also an O(1) operation.

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

XNA Framework

Supported in: 3.0, 2.0, 1.0

Portable Class Library

Supported in: Portable Class Library

Supported in: Windows Phone 8.1

Supported in: Windows Phone Silverlight 8.1

Supported in: Windows Phone Silverlight 8
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