C# | Creating a HybridDictionary with specified initial size & case sensitivity

Last Updated : 01 Feb, 2019

HybridDictionary(Int32, Boolean) creates a HybridDictionary with the specified initial size and case sensitivity.

Syntax:

public HybridDictionary (int initialSize, bool caseInsensitive);

Parameters:

initialSize : The approximate number of entries that the HybridDictionary can initially contain.
caseInsensitive : A Boolean that denotes whether the HybridDictionary is case-insensitive.

Below programs illustrate the use of HybridDictionary(Int32, Boolean):

Example 1:

// C# code to create a HybridDictionary 
// with the specified initial size 
// and case sensitivity. 
using System; 
using System.Collections; 
using System.Collections.Specialized; 
  
class GFG { 
  
    // Driver code 
    public static void Main() 
    { 
  
        // Creating a HybridDictionary with the 
        // specified initial size and case sensitivity. 
        HybridDictionary myDict = new HybridDictionary(10, false); 
  
        // Adding key/value pairs in myDict 
        myDict.Add("I", "first"); 
  
        // This will not raise exception as the 
        // Collection is not case-insensitive 
        myDict.Add("i", "first"); 
        myDict.Add("II", "second"); 
        myDict.Add("III", "third"); 
        myDict.Add("IV", "fourth"); 
        myDict.Add("V", "fifth"); 
  
        // Displaying the key/value pairs in myDict 
        foreach(DictionaryEntry de in myDict) 
            Console.WriteLine(de.Key + " " + de.Value); 
    } 
} 

Output:

III third
V fifth
II second
i first
I first
IV fourth

Example 2:

// C# code to create a HybridDictionary 
// with the specified initial size 
// and case sensitivity. 
using System; 
using System.Collections; 
using System.Collections.Specialized; 
  
class GFG { 
  
    // Driver code 
    public static void Main() 
    { 
  
        // Creating a HybridDictionary with the 
        // specified initial size and case sensitivity. 
        HybridDictionary myDict = new HybridDictionary(10, true); 
  
        // Adding key/value pairs in myDict 
        myDict.Add("A", "Apple"); 
  
        // This will raise exception as the 
        // Collection is case-insensitive 
        myDict.Add("a", "Air"); 
        myDict.Add("B", "Banana"); 
        myDict.Add("C", "Cat"); 
        myDict.Add("D", "Dog"); 
        myDict.Add("E", "Elephant"); 
        myDict.Add("F", "Fish"); 
  
        // Displaying the key/value pairs in myDict 
        foreach(DictionaryEntry de in myDict) 
            Console.WriteLine(de.Key + " " + de.Value); 
    } 
} 

Runtime Error:

Unhandled Exception:
System.ArgumentException: Item has already been added. Key in dictionary: ‘A’ Key being added: ‘a’
at System.Collections.Hashtable.Insert

Note:

If the initial size of the collection is greater than the optimal size for a ListDictionary, the collection is stored in a Hashtable to avoid the overhead of copying elements from the ListDictionary to the Hashtable.
This constructor is an O(n) operation, where n is initialSize.

C# | Creating an empty case-sensitive HybridDictionary Class

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C# | Creating a HybridDictionary with specified initial size & case sensitivity

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