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Lesson 5 - Dictionaries and sets in C# .NET

In the previous lesson, Multidimentional arrays in C# .NET, we introduced, tried out linked lists, and then made a detour over to multi-dimensional arrays in C# .NET. Today's tutorial is going to be about dictionaries and sets.

Dictionaries

The idea of the dictionary is that we often need to access an element using a key. This concept works the same as with an array where the keys (indexes) are numeric. The dictionary allows us to index using any data type, e.g. a string. We then access the elements of the collection using these strings. An analogy can be found in a real paper dictionary where we have each string word associated with the translation, explanation, other meanings, etc.

The data in this collection is stored in a special way known as hashing. This approach allows us to


 

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In this tutorial, we'll introduce dictionaries and sets. We'll describe the Dictionary and HashSet classes and try them out on a few examples.

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Article has been written for you by David Capka
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The author is a programmer, who likes web technologies and being the lead/chief article writer at ICT.social. He shares his knowledge with the community and is always looking to improve. He believes that anyone can do what they set their mind to.
Unicorn College The author learned IT at the Unicorn College - a prestigious college providing education on IT and economics.
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