C# | Check if two ArrayList objects are equal
Last Updated : 18 Feb, 2019
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Equals(Object) Method which is inherited from the Object class is used to check whether the specified ArrayList object is equal to another ArrayList object or not. Syntax:CSharp CSharp
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, false. Below programs illustrate the use of above-discussed method: Example 1:
// C# program to if a ArrayList
// is equal to itself or not
using System;
using System.Collections;
class Geeks {
// Main Method
public static void Main(String[] args)
{
// Creating a ArrayList
ArrayList arrlist = new ArrayList();
// Adding elements to ArrayList
arrlist.Add(1);
arrlist.Add(2);
arrlist.Add(3);
arrlist.Add(4);
arrlist.Add(5);
// Checking whether arrlistis
// equal to itself or not
Console.WriteLine(arrlist.Equals(arrlist));
}
}
Output:
Example 2: The equals method only check if both ArrayList references refer to same object or not. It returns false if two objects are different, even if they have same values.True
// C# program to if a ArrayList
// is equal to another ArrayList
using System;
using System.Collections;
class Geeks {
// Main Method
public static void Main(String[] args)
{
// Creating a ArrayList
ArrayList arrlist = new ArrayList();
// Adding elements to ArrayList
arrlist.Add("This");
arrlist.Add("is");
arrlist.Add("C#");
arrlist.Add("ArrayList");
arrlist.Add("Tutorial.");
// Creating an ArrayList
ArrayList arrlist2 = new ArrayList();
// Adding elements to ArrayList
arrlist2.Add("This");
arrlist2.Add("is");
arrlist2.Add("C#");
arrlist2.Add("ArrayList");
arrlist2.Add("Tutorial.");
// Checking whether arrlist is
// equal to arrlist2 or not
Console.WriteLine(arrlist.Equals(arrlist2));
// Creating a ArrayList
ArrayList arrlist3 = new ArrayList();
// Assigning arrlist2 to arrlist3
arrlist3 = arrlist2;
// Checking whether arrlist3 is
// equal to arrlist2 or not
Console.WriteLine(arrlist3.Equals(arrlist2));
}
}
Output:
Note: If the current instance is a reference type, the Equals(Object) method checks for reference equality.False True
