C# | Check if HybridDictionary is read only

HybridDictionary.IsReadOnly property is used to get a value that indicates whether the HybridDictionary is read-only or not.

Syntax:

public bool IsReadOnly { get; }

Return Value: This property always returns false.

Below programs illustrate the use of HybridDictionary.IsReadOnly property:

Example 1:

// C# code to check whether the
// HybridDictionary is read-only.
using System;
using System.Collections;
using System.Collections.Specialized;

class GFG {

    // Driver code
    public static void Main()
    {

        // Creating a HybridDictionary named myDict
        HybridDictionary myDict = new HybridDictionary();

        // Adding key/value pairs in myDict
        myDict.Add("A", "Apple");
        myDict.Add("B", "Banana");
        myDict.Add("C", "Cat");
        myDict.Add("D", "Dog");
        myDict.Add("E", "Elephant");
        myDict.Add("F", "Fish");

        // To check whether the HybridDictionary
        // is read-only.
        Console.WriteLine(myDict.IsReadOnly);
    }
}

Output:

False

Example 2:

// C# code to check whether the
// HybridDictionary is read-only.
using System;
using System.Collections;
using System.Collections.Specialized;

class GFG {

    // Driver code
    public static void Main()
    {

        // Creating a HybridDictionary named myDict
        HybridDictionary myDict = new HybridDictionary();

        // Adding key/value pairs in myDict
        myDict.Add("one", "1");
        myDict.Add("two", "2");
        myDict.Add("three", "3");
        myDict.Add("four", "4");

        // To check whether the HybridDictionary
        // is read-only.
        Console.WriteLine(myDict.IsReadOnly);
    }
}

Output:

False

Note:

• A collection that is read-only does not allow the addition, removal, or modification of elements after the collection is created.
• Retrieving the value of this property is an O(1) operation.
• A collection that is read-only is simply a collection with a wrapper that prevents modifying the collection. Therefore, if changes are made to the underlying collection, the read-only collection reflects those changes.

Reference:

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