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Collection<T>.IList.Item Property

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Gets or sets the element at the specified index.

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

Syntax

Copy

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[Int32]

Exceptions

Exception	Condition
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.

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

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