ArrayList.Item Property (Int32)
Gets or sets the element at the specified index.
Assembly: mscorlib (in mscorlib.dll)
abstract Item : index:int -> Object with get, set override Item : index:int -> Object with get, set
Parameters
- index
-
Type:
System.Int32
The zero-based index of the element to get or set.
Implements
IList.Item(Int32)| Exception | Condition |
|---|---|
| ArgumentOutOfRangeException |
The Item returns an Object, so you may need to cast the returned value to the original type in order to manipulate it. It is important to note that ArrayList is not a strongly-typed collection. For a strongly-typed alternative, see List<'T>.
ArrayList accepts null 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 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.
The following code example creates an ArrayList and adds several items. The example demonstrates accessing elements with the Item property (the indexer in C#), and changing an element by assigning a new value to the Item property for a specified index. The example also shows that the Item property cannot be used to access or add elements outside the current size of the list.
Available since 10
.NET Framework
Available since 1.1