Question

How to check if two List objects are equal in C#

Answer 1

using System;
using System.Collections.Generic; 
                       
public class Program
{
    public static void Main()
    {
        List<string> list1 = new List<string>(); 
   
        list1.Add("c#"); 
        list1.Add("c++"); 
        list1.Add("c"); 
 
        List<string> list2 = new List<string>(); 
   
        list2.Add("c#"); 
        list2.Add("c++"); 
        list2.Add("c"); 
         
        Console.WriteLine(list1.Equals(list2)); 
   
        List<string> list3 = new List<string>(); 
        list3 = list1; 
        Console.WriteLine(list3.Equals(list1)); 
        
        Console.WriteLine(list3.Equals(list2)); 
    }
}
   
 
   
/*
run:
   
False
True
False
   
*/

 

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Answer 2

using System;
using System.Linq;
using System.Collections.Generic; 
                       
public class Program
{
    public static void Main()
    {
        List<string> list1 = new List<string>(); 
   
        list1.Add("c#"); 
        list1.Add("c++"); 
        list1.Add("c"); 
 
        List<string> list2 = new List<string>(); 
   
        list2.Add("c#"); 
        list2.Add("c++"); 
        list2.Add("c"); 
         
        Console.WriteLine(list1.SequenceEqual(list2)); 
        
        bool isEqual = list1.All(list2.Contains) && list2.All(list1.Contains);
        Console.WriteLine(isEqual);  
        
    }
}
   
 
   
/*
run:
   
True
True
   
*/

 

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