Check if a HashSet and a specified collection share common element in C#

To check if a HashSet and a specified collection share a common element, the C# code is as follows −

Example

 Live Demo

using System;
using System.Collections.Generic;
public class Demo {
   public static void Main(){
      HashSet<int> set1 = new HashSet<int>();
      set1.Add(25);
      set1.Add(50);
      set1.Add(75);
      set1.Add(100);
      set1.Add(125);
      set1.Add(150);
      Console.WriteLine("Elements in HashSet1");
      foreach(int val in set1){
         Console.WriteLine(val);
      }
      HashSet<int> set2 = new HashSet<int>();
      set2.Add(30);
      set2.Add(60);
      set2.Add(100);
      set2.Add(150);
      set2.Add(200);
      set2.Add(250);
      Console.WriteLine("Elements in HashSet2");
      foreach(int val in set2){
         Console.WriteLine(val);
      }
      Console.WriteLine("Do they share common elements? "+set1.Overlaps(set2));
   }
}

Output

This will produce the following output −

Elements in HashSet1
25
50
75
100
125
150
Elements in HashSet2
30
60
100
150
200
250
Do they share common elements? True

Example

Let us now see another example −

Live Demo

using System;
using System.Collections.Generic;
public class Demo {
   public static void Main(){
      HashSet<String> set1 = new HashSet<String>();
      set1.Add("Nathan");
      set1.Add("Tim");
      set1.Add("Tom");
      set1.Add("Jack");
      set1.Add("Steve");
      set1.Add("David");
      Console.WriteLine("Elements in HashSet1");
      foreach(string val in set1){
         Console.WriteLine(val);
      }
      HashSet<String> set2 = new HashSet<String>();
      set2.Add("Tom");
      set2.Add("Jack");
      set2.Add("Kevin");
      Console.WriteLine("Elements in HashSet2");
      foreach(string val in set2){
         Console.WriteLine(val);
      }
      Console.WriteLine("Do they share common elements? "+set1.Overlaps(set2));
   }
}

Output

This will produce the following output −

Elements in HashSet1
Nathan
Tim
Tom
Jack
Steve
David
Elements in HashSet2
Tom
Jack
Kevin
Do they share common elements? True

AmitDiwan

Updated on 04-Dec-2019 05:20:15

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