What is Dictionary in DotNet?

Question

What is Dictionary in DotNet? please tell me with Examples.

Satyapriya Nayak · Answer

Hi Magesh, Dictionary 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#. 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. C# using System.Collections.Generic; VB.NET Imports 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. The following code snippet creates a Dictionary, adds some data to it and reads data back. VB.NET Code: Imports System.Collections.Generic Module Module1 Sub Main() Dim AuthorList As New Dictionary ( Of String , Int16 ) 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) ' Read all data Console .WriteLine( "Authors List" ) For Each author As KeyValuePair ( Of String , Int16 ) In AuthorList Console .WriteLine( "Key = {0}, Value = {1}" , _ author.Key, author.Value) Next author Console .ReadKey() End Sub End Module C# Code: using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Collections.Generic; namespace DictionarySample { class Program { static void Main( string [] args) { Dictionary string , Int16 > AuthorList = new Dictionary string , Int16 >(); 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); // Read all data Console .WriteLine( "Authors List" ); foreach ( KeyValuePair string , Int16 > author in AuthorList ) { Console .WriteLine( "Key = {0}, Value = {1}" , author.Key, author.Value); } Console .ReadKey(); } } } Please refer the below link http://www.c-sharpcorner.com/UploadFile/mahesh/dictionary-in-C-Sharp/ http://www.dotnetperls.com/dictionary http://www.c-sharpcorner.com/uploadfile/niradhip/dictionary-in-C-Sharp/ Thanks

Senthilkumar · Answer

Hi, Please refer these url: http://www.dotnetperls.com/dictionary http://msdn.microsoft.com/en-us/library/xfhwa508.aspx

Narayan · Answer

Take a look at this http://www.dotnetperls.com/dictionary