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