C# | Creating an empty HybridDictionary with specified case sensitivity

HybridDictionary(Boolean) constructor creates an empty HybridDictionary with the specified case sensitivity.

Syntax:

public HybridDictionary (bool caseInsensitive);

Here, caseInsensitive is a Boolean that denotes whether the HybridDictionary is case-insensitive.

Below given are some examples to understand the implementation in a better way:

Example 1:

// C# code to create an empty
// HybridDictionary with the
// specified case sensitivity.
using System;
using System.Collections;
using System.Collections.Specialized;

class GFG {

    // Driver code
    public static void Main()
    {

        // Creating an empty HybridDictionary
        // with the specified case sensitivity.
        HybridDictionary myDict = new HybridDictionary(false);

        // Adding key/value pairs in myDict
        myDict.Add("I", "first");
        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:

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

Example 2:

// C# code to create an empty
// HybridDictionary with the
// specified case sensitivity.
using System;
using System.Collections;
using System.Collections.Specialized;

class GFG {

    // Driver code
    public static void Main()
    {

        // Creating an empty HybridDictionary
        // with the specified case sensitivity.
        HybridDictionary myDict = new HybridDictionary(true);

        // Adding key/value pairs in myDict
        myDict.Add("A", "Apple");
        myDict.Add("a", "Air");
        myDict.Add("B", "Banana");
        myDict.Add("C", "Cat");
        myDict.Add("D", "Dog");
        myDict.Add("d", "Dolphine");
        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: An entry with the same key already exists.
at System.Collections.Specialized.ListDictionary.Add

Note: This constructor is an O(1) operation.