Check if two Dictionary objects are equal in C#

Equals(Object) Method which is inherited from the Object class is used to check if a specified Dictionary object is equal to another Dictionary object or not.

Syntax:

public virtual bool Equals (object obj);

Here, obj is the object which is to be compared with the current object.

Return Value: This method return true if the specified object is equal to the current object otherwise it returns false.

Below programs illustrate the use of above-discussed method:

Example 1:

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// C# code to check if two
// Dictionary are equal or not
using System;
using System.Collections.Generic;
  
class GFG {
  
    // Driver code
    public static void Main()
    {
  
        // Creating a Dictionary named myDict
        Dictionary<string, string> myDict = 
           new Dictionary<string, string>();
  
        // Adding key/value pairs in myDict
        myDict.Add("Australia", "Canberra");
        myDict.Add("Belgium", "Brussels");
        myDict.Add("Netherlands", "Amsterdam");
        myDict.Add("China", "Beijing");
        myDict.Add("Russia", "Moscow");
        myDict.Add("India", "New Delhi");
  
        // Checking whether myDict is
        // equal to itself or not
        Console.WriteLine(myDict.Equals(myDict));
    }
}

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Output:

True

Example 2:

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// C# code to check if two
// Dictionary are equal or not
using System;
using System.Collections.Generic;
  
class GFG {
  
    // Driver code
    public static void Main()
    {
  
        // Creating a Dictionary named myDict
        Dictionary<string, string> myDict1 = 
            new Dictionary<string, string>();
  
        // Adding key/value pairs in myDict
        myDict1.Add("I", "first");
        myDict1.Add("II", "second");
        myDict1.Add("III", "third");
        myDict1.Add("IV", "fourth");
        myDict1.Add("V", "fifth");
  
        // Creating a Dictionary named myDict2
        Dictionary<string, string> myDict2 = 
            new Dictionary<string, string>();
  
        myDict2.Add("1st", "C");
        myDict2.Add("2nd", "C++");
        myDict2.Add("3rd", "Java");
        myDict2.Add("4th", "C#");
        myDict2.Add("5th", "HTML");
        myDict2.Add("6th", "PHP");
  
        // Checking whether myDict1 is
        // equal to myDict2 or not
        Console.WriteLine(myDict1.Equals(myDict2));
  
        // Creating a new Dictionary
        Dictionary<string, string> myDict3 = 
           new Dictionary<string, string>();
  
        // Assigning myDict2 to myDict3
        myDict3 = myDict2;
  
        // Checking whether myDict3 is
        // equal to myDict2 or not
        Console.WriteLine(myDict3.Equals(myDict2));
    }
}

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Output:

False
True

Note: If the current instance is a reference type, the Equals(Object) method checks for reference equality.



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