Storing data in a dictionary

Dictionaries, or associative arrays or hash maps, are widely used data structures in programming. Dictionaries provide a way to store and retrieve data using key-value pairs. The key is used to store and retrieve the related data. There are also methods to return the keys as a list that can be iterated over.

In VB.NET, dictionaries are represented by the Dictionary(Of TKey, TValue) class, which is part of the System.Collections.Generic namespace. Dictionaries provide a data structure that stores key-value pairs, allowing efficient lookup and retrieval of values based on their associated keys.

Here’s an example of how to use dictionaries in VB.NET:

Dim studGrades As New Dictionary(Of String, Integer)()
studGrades.Add("Seamus", 92)
studGrades.Add("Freya", 95)
studGrades.Add("Aspen", 89)
For Each pair As KeyValuePair(Of String, Integer) In studGrades
    Console.WriteLine(pair.Key & &quot...