Dictionary in c#

A Dictionary class represents a dictionary in C# that is used to represent a collection of keys and values pair of data. This article demonstrates how to use a dictionary in C#.

Creating a Dictionary

The Dictionary class is a generic class and can store any data types. This class is defined in the System.Collections.Generic namespace. Before you use a Dictionary class in your code, you must import the System.Collections.Generic namespace using the following line.

using System.Collections.Generic;

As other collection classes, the Dictionary class has Add, Remove, RemoveAt and other collection methods. The Key and Value property are used to extract a key and a value from an item in a Dictionary.

Adding data in the dictionary -

Dictionary AuthorList = new Dictionary();

AuthorList.Add("Mahesh Chand", 35);
AuthorList.Add("Mike Gold", 25);
AuthorList.Add("Praveen Kumar", 29);
AuthorList.Add("Raj Beniwal", 21);
AuthorList.Add("Dinesh Beniwal", 84);

Reading data from dictionary -

foreach( KeyValuePair author in AuthorList )
{
Response,Write(author.Key, author.Value);
}