Data Structure VB.Net

Imports System
Imports System.Collections
Imports System.Collections.Specialized
Class TestCollectionsUtils
    Public Shared Sub Main()
        Dim population1 As Hashtable = CollectionsUtil.CreateCaseInsensitiveHashtable()
        population1("A") = 1
        population1("B") = 2
        population1("C") = 1
        population1("D") = 1
    End Sub
End Class