The Keys property is an efficient way to retrieve keys by index
Imports System Imports System.Collections.Generic Public Class Example Public Shared Sub Main() Dim openWith As New SortedList(Of String, String) openWith.Add("A", "a") openWith.Add("B", "b") openWith.Add("C", "c") openWith.Add("D", "d") Console.WriteLine(vbLf & "Indexed retrieval using the " & _ "Keys property: Keys(2) = {0}", openWith.Keys(2)) End Sub End Class