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List<T>::Item Property

Gets or sets the element at the specified index.

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

public:
virtual property T Item[int index] {
	T get (int index) sealed;
	void set (int index, T value) sealed;
}

Parameters

index
Type: System::Int32

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

Property Value

Type: T
The element at the specified index.

Implements

IList<T>::Item
IReadOnlyList<T>::Item

ExceptionCondition
ArgumentOutOfRangeException

index is less than 0.

-or-

index is equal to or greater than Count.

List<T> accepts nullptr as a valid value for reference types and allows duplicate elements.

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

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

The example in this section demonstrates the Item property (the indexer in C#) and various other properties and methods of the List<T> generic class. After the list has been created and populated using the Add method, an element is retrieved and displayed using the Item property. (For an example that uses the Item property to set the value of a list element, see AsReadOnly.)

NoteNote

Visual Basic, C#, and C++ all have syntax for accessing the Item property without using its name. Instead, the variable containing the List<T> is used as if it were an array.

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

No code example is currently available or this language may not be supported.

.NET Framework

Supported in: 4.5, 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

.NET for Windows Store apps

Supported in: Windows 8

.NET for Windows Phone apps

Supported in: Windows Phone 8.1, Windows Phone Silverlight 8.1, Windows Phone Silverlight 8

Windows Phone 8.1, Windows Phone 8, Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

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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