How to create a StringDictionary in C#

Last Updated : 27 Feb, 2019

StringDictionary() constructor is used to initialize a new instance of the StringDictionary class which will be empty and will have the default initial capacity. StringDictionary is a specialized collection. This class comes under the System.Collections.Specialized namespace. It only allows string keys and string values. It suffers from performance problems. It implements a hash table with the key and the value strongly typed to be strings rather than objects.

Syntax:

public StringDictionary ();

Example 1:

   // C# Program to illustrate how 
// to create a StringDictionary 
using System; 
using System.Collections; 
using System.Collections.Specialized; 
  
class Geeks { 
  
    // Main Method 
    public static void Main(String[] args) 
    { 
  
        // sd is the StringDictionary object 
        // StringDictionary() is the constructor 
        // used to initializes a new 
        // instance of the StringDictionary class 
        StringDictionary sd = new StringDictionary(); 
  
        // Count property is used to get the 
        // number of elements in StringDictionary 
        // It will give 0 as no elements 
        // are present currently 
        Console.WriteLine(sd.Count); 
    } 
} 
 
  

Output:

Example 2:

   // C# Program to illustrate how 
// to create a StringDictionary 
using System; 
using System.Collections; 
using System.Collections.Specialized; 
  
class Geeks { 
  
    // Main Method 
    public static void Main(String[] args) 
    { 
  
        // sd is the StringDictionary object 
        // StringDictionary() is the constructor 
        // used to initializes a new 
        // instance of the StringDictionary class 
        StringDictionary sd = new StringDictionary(); 
  
        Console.Write("Before Add Method: "); 
  
        // Count property is used to get the 
        // number of elements in StringDictionary 
        // It will give 0 as no elements 
        // are present currently 
        Console.WriteLine(sd.Count); 
  
        // Adding key/value pairs in sd 
        sd.Add("1", "C"); 
        sd.Add("2", "C++"); 
        sd.Add("3", "Java"); 
        sd.Add("4", "Python"); 
        sd.Add("5", "C#"); 
        sd.Add("6", "HTML"); 
  
        Console.Write("After Add Method: "); 
  
        // Count property is used to get the 
        // number of elements in sd 
        Console.WriteLine(sd.Count); 
    } 
} 
 
  

Output:

  Before Add Method: 0  After Add Method: 6

Reference:

https://docs.microsoft.com/en-us/dotnet/api/system.collections.specialized.stringdictionary.-ctor?view=netframework-4.7.2

C# | Removing all entries from the StringDictionary

Kirti_Mangal

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