Item Property

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Gets or sets the element at the specified index.

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

public virtual Object 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 less than zero.

-or-

index is equal to or greater than Count.

ArrayList accepts nullNothingnullptrunita null reference (Nothing in Visual Basic) as a valid value and allows duplicate elements.

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 Item property. Visual Basic implements 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.

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