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OOPs-Introduction
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If-Else Alternative Ways
Abstract Class & Interface
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Abstract Class vs Interface
When-Abstract Class and Interface
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Interface - Real Application
Interface and Abstract Class-Questions
Collections
Generics Introduction
Collections Introduction
Array vs ArrayList
Hashtable vs Dictionary
List vs Dictionary
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This Keyword
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List vs Dictionary

In this article we are going to discuss difference between List and Dictionary in C#. There are many blogs, articles are available on the internet regarding it but in this particular article I will try to explain to you with as much as simplest and realistic examples so you can get a clear idea of the List and Dictionary in C#.

List<T> and Dictionary<TKey, TValue> are both part of the System.Collections.Generic namespace in C# and serve different purposes. Here are the key differences between the two.

Difference Between Hashtable and Dictionary in C#

S.No.	List	Dictionary
1	Represents a strongly-typed list of objects that can be accessed by index.	Represents a collection of key-value pairs. It is useful for storing data that needs to be accessed by a unique key.
2	List maintains the order of elements as they are added.	Does not guarantee the order of elements. The order of elements depends on the hash codes of the keys.
3	List allows duplicate elements.	Does not allow duplicate keys. Each key must be unique.
4	Use when you need an ordered collection of items that can be accessed by index, and you may need to perform list-specific operations such as sorting, reversing, or finding elements by index.	Use when you need to quickly look up values by a unique key and when the order of items is not important.
5	Example `List list = new List { "one", "two", "three" }; list.Add("four"); foreach (string item in list) { Console.WriteLine(item); }`	Example `Dictionary dictionary = new Dictionary { { 1, "one" }, { 2, "two" }, { 3, "three" } }; dictionary.Add(4, "four"); foreach (KeyValuePair kvp in dictionary) { Console.WriteLine($"Key: {kvp.Key}, Value: {kvp.Value}"); }`

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List vs Dictionary

Difference Between Hashtable and Dictionary in C#

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