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In C#, a Dictionary is a collection that stores key-value pairs. It is part of the System.Collections.Generic namespace and implements the IDictionary<TKey, TValue> interface. A dictionary in C# is similar to a hashtable but with the added benefit of being a generic collection, which means it can store keys and values of any data types.
Creating and Initializing a Dictionary
To create a dictionary, you specify the types of keys and values it can store. Here's an example of how to create and initialize a dictionary with some key-value pairs:
// Creating a dictionary with integer keys and string valuesIDictionary<int, string> numberNames = new Dictionary<int, string>();numberNames.Add(1, "One"); // Adding key-value pairs using Add() methodnumberNames.Add(2, "Two");numberNames.Add(3, "Three");// Creating a dictionary using collection-initializer syntaxvar cities = new Dictionary<string, string>(){{"UK", "London, Manchester, Birmingham"},{"USA", "Chicago, New York, Washington"},{"India", "Mumbai, New Delhi, Pune"}}; c# - Get dictionary value by key - Stack Overflow
WEBAug 29, 2012 · How can I get the dictionary value by a key on a function? String xmlfile = Data_Array.TryGetValue("XML_File", out value); …
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Dictionary<TKey,TValue> Class (System.Collections.Generic)
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Dictionary<TKey,TValue>.TryGetValue(TKey, TValue) Method …
C# - Get value from dictionary - makolyte
WEBSep 14, 2023 · When you want to get the value for a key, you can use the indexer syntax and specify the key, like this: var dictionary = new Dictionary<string, int>() ["Bob"] = 1, ["Linda"] = 2 }; //Get value by key …
C# - Dictionary<TKey, TValue> - TutorialsTeacher.com
WEBAccess Dictionary Elements. The Dictionary can be accessed using indexer. Specify a key to get the associated value. You can also use the ElementAt() method to get a KeyValuePair from the specified index.
Dictionary<TKey,TValue>.Values Property …
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How to Get an Item by Index From Dictionary in C
WEBJul 13, 2022 · The Dictionary<TKey,TValue> generic class provides the ability to map keys to values. Retrieving a value by using its key is quite fast, almost O (1) thanks to the implementation of Dictionary<TKey, …
C# - Get dictionary key by value - makolyte
WEBSep 28, 2023 · C# – Get dictionary key by value. 05/19/2024 by Mak. Dictionaries have keys mapped to values, which enables you to efficiently lookup values by key. But you can also do a reverse lookup: get the key …
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Get and Set Dictionary Key-Value Pairs Example (C#)
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