Hashtable in VB.NET
Hashtable is used in VB.NET to perform very fast and deterministic lookups from any key to a previously specified value.
Hashtable collection in VB.NET offers the ability to perform very fast and deterministic lookups from any key to a previously specified value. You store any type of object but you store them in key/value pairs. This way you can retrieve an item by a value instead of a numeric index. Conceptually, you add keys and values together, and then can search the table instantly, or even remove elements. As shown in this tutorial, the Hashtable provides a powerful and optimized lookup mechanism.
Given below example shows you how to create an simple Hashtable.
' Create an HashRecord.
Dim Record As Hashtable = New Hashtable
Record(1) = "One"
Record(2) = "Two"
Record(15) = "Fifteen"
For Each e As DictionaryEntry In Record