C# | Get a read-only copy of the OrderedDictionary

Last Updated : 01 Feb, 2019

OrderedDictionary.AsReadOnly method returns a read-only copy of the current OrderedDictionary collection. Syntax:

public System.Collections.Specialized.OrderedDictionary AsReadOnly ();

Return Value: A read-only copy of the current OrderedDictionary collection. Below given are some examples to understand the implementation in a better way: Example 1:

CSHARP

// C# code to get a read-only
// copy of the OrderedDictionary
using System;
using System.Collections;
using System.Collections.Specialized;

class GFG {

    // Driver method
    public static void Main()
    {

        // Creating a orderedDictionary named myDict
        OrderedDictionary myDict = new OrderedDictionary();

        // Adding key and value in myDict
        myDict.Add("key1", "value1");
        myDict.Add("key2", "value2");
        myDict.Add("key3", "value3");
        myDict.Add("key4", "value4");
        myDict.Add("key5", "value5");

        // To Get a read-only copy of
        // the OrderedDictionary
        OrderedDictionary myDict_1 = myDict.AsReadOnly();

        // Checking if myDict_1 is read-only
        Console.WriteLine(myDict_1.IsReadOnly);
    }
}

Output:

True

Example 2:

CSHARP

// C# code to get a read-only
// copy of the OrderedDictionary
using System;
using System.Collections;
using System.Collections.Specialized;

class GFG {

    // Driver method
    public static void Main()
    {

        // Creating a orderedDictionary named myDict
        OrderedDictionary myDict = new OrderedDictionary();

        // Adding key and value in myDict
        myDict.Add("A", "Apple");
        myDict.Add("B", "Banana");
        myDict.Add("C", "Cat");
        myDict.Add("D", "Dog");

        // To Get a read-only copy of
        // the OrderedDictionary
        OrderedDictionary myDict_1 = myDict.AsReadOnly();

        // Checking if myDict_1 is read-only
        Console.WriteLine(myDict_1.IsReadOnly);
    }
}

Output:

True

Note: The AsReadOnly method creates a read-only wrapper around the current OrderedDictionary collection. Changes made to the OrderedDictionary collection are reflected in the read-only copy. Reference:

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

C# | Add key and value into OrderedDictionary collection

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C# | Get a read-only copy of the OrderedDictionary

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