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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
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 −
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
Updated on: 04-Dec-2019
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