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Union of two HashSet in C#
Let us see an example to get the Union of two HashSet
Example
using System; using System.Collections.Generic; public class Demo { public static void Main(){ HashSet<int> set1 = new HashSet<int>(); set1.Add(100); set1.Add(200); set1.Add(300); set1.Add(400); set1.Add(500); set1.Add(600); Console.WriteLine("HashSet1 elements..."); foreach(int ele in set1){ Console.WriteLine(ele); } HashSet<int> set2 = new HashSet<int>(); set2.Add(100); set2.Add(200); set2.Add(300); set2.Add(400); set2.Add(500); set2.Add(600); Console.WriteLine("HashSet2 elements..."); foreach(int ele in set2){ Console.WriteLine(ele); } Console.WriteLine("Union..."); set1.UnionWith(set2); foreach(int ele in set1){ Console.WriteLine(ele); } } }
Output
This will produce the following output −
HashSet1 elements... 100 200 300 400 500 600 HashSet2 elements... 100 200 300 400 500 600 Union... 100 200 300 400 500 600
Example
Let us now see another example −
using System; using System.Collections.Generic; public class Demo { public static void Main(){ HashSet<int> set1 = new HashSet<int>(); set1.Add(100); set1.Add(200); set1.Add(300); set1.Add(400); set1.Add(500); set1.Add(600); Console.WriteLine("HashSet1 elements..."); foreach(int ele in set1){ Console.WriteLine(ele); } HashSet<int> set2 = new HashSet<int>(); set2.Add(100); set2.Add(250); set2.Add(300); Console.WriteLine("HashSet2 elements..."); foreach(int ele in set2){ Console.WriteLine(ele); } Console.WriteLine("Union..."); set1.UnionWith(set2); foreach(int ele in set1){ Console.WriteLine(ele); } } }
Output
This will produce the following output −
HashSet1 elements... 100 200 300 400 500 600 HashSet2 elements... 100 250 300 Union... 100 200 300 400 500 600 250
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