'Usage

Dim source As IEnumerable(Of TSource)
Dim index As Integer
Dim returnValue As TSource

returnValue = source.ElementAt(index)

'Declaration

<ExtensionAttribute> _
Public Shared Function ElementAt(Of TSource) ( _
    source As IEnumerable(Of TSource), _
    index As Integer _
) As TSource

Usage Note

If the type of source implements IList<(Of <(T>)>), that implementation is used to obtain the element at the specified index. Otherwise, this method obtains the specified element.

This method throws an exception if index is out of range. To instead return a default value when the specified index is out of range, use the ElementAtOrDefault<(Of <(TSource>)>) method.

The following code example demonstrates how to use ElementAt<(Of <(TSource>)>) to return an element at a specific position.

' Create an array of strings.
Dim names() As String = _
    {"Hartono, Tommy", "Adams, Terry", "Andersen, Henriette Thaulow", "Hedlund, Magnus", "Ito, Shu"}

Dim random As Random = New Random(DateTime.Now.Millisecond)

' Get a string at a random index within the array.
Dim name As String = names.ElementAt(random.Next(0, names.Length))

' Display the output.
MsgBox("The name chosen at random is " & name)

' This code produces the following output:
'
' The name chosen at random is Ito, Shu

Windows 7, Windows Vista, Windows XP SP2, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows CE, Windows Mobile for Smartphone, Windows Mobile for Pocket PC, Xbox 360, Zune

.NET Framework

.NET Compact Framework

XNA Framework

Reference