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Check if a HashSet is a subset of the specified collection in C#
To check if a HashSet is a subset of the specified collection, the code is as follows −
Example
using System;
using System.Collections.Generic;
public class Demo {
public static void Main(){
HashSet<string> set1 = new HashSet<string>();
set1.Add("EF");
set1.Add("OP");
Console.WriteLine("Elements in HashSet1");
foreach(string val in set1){
Console.WriteLine(val);
}
HashSet<string> set2 = new HashSet<string>();
set2.Add("KL");
set2.Add("MN");
set2.Add("OP");
set2.Add("QR");
Console.WriteLine("Elements in HashSet2");
foreach(string val in set2){
Console.WriteLine(val);
}
Console.WriteLine("Is set1 a subset of set2? "+set1.IsSubsetOf(set2));
}
}Output
This will produce the following output −
Elements in HashSet1 EF OP Elements in HashSet2 KL MN OP QR Is set1 a subset of set2? False
Example
Let us see another example −
using System;
using System.Collections.Generic;
public class Demo {
public static void Main(){
HashSet<string> set1 = new HashSet<string>();
set1.Add("EF");
set1.Add("OP");
Console.WriteLine("Elements in HashSet1");
foreach(string val in set1){
Console.WriteLine(val);
}
HashSet<string> set2 = new HashSet<string>();
set2.Add("EF");
set2.Add("OP");
set2.Add("QR");
Console.WriteLine("Elements in HashSet2");
foreach(string val in set2){
Console.WriteLine(val);
}
Console.WriteLine("Is set1 a subset of set2? "+set1.IsSubsetOf(set2));
}
}Output
This will produce the following output −
Elements in HashSet1 EF OP Elements in HashSet2 EF OP QR Is set1 a subset of set2? True
Updated on: 04-Dec-2019
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