The OrderedDictionary Collection

The System.Collections.Specialized.OrderedDictionary collection works like HashTable but differs in that items can be accessed via either the key or the index, as demonstrated by the following code:

Dim od As New OrderedDictionaryod.Add("a", 1)'Access via indexDim item As DictionaryEntry = CType(od(0), DictionaryEntry)Console.WriteLine(item.Value)

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