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Getting an enumerator that iterates through HashSet in C#
To get an enumerator that iterates through HashSet, the code is as follows −
Example
using System;
using System.Collections.Generic;
public class Demo {
public static void Main(String[] args) {
HashSet<string> set1 = new HashSet<string>();
set1.Add("A");
set1.Add("B");
set1.Add("C");
set1.Add("D");
set1.Add("E");
set1.Add("F");
set1.Add("G");
set1.Add("H");
Console.WriteLine("Elements in HashSet1...");
foreach (string res in set1) {
Console.WriteLine(res);
}
HashSet<string> set2 = new HashSet<string>();
set2.Add("John");
set2.Add("Jacob");
set2.Add("Ryan");
set2.Add("Tom");
set2.Add("Andy");
set2.Add("Tim");
set2.Add("Steve");
set2.Add("Mark");
Console.WriteLine("Elements in HashSet2... (Enumerator iterating through HashSet)");
HashSet<string>.Enumerator demoEnum = set2.GetEnumerator();
while (demoEnum.MoveNext()) {
string res = demoEnum.Current;
Console.WriteLine(res);
}
Console.WriteLine("Is HashSet1 equal to HashSet2? = "+set1.Equals(set2));
Console.WriteLine("Count of HashSet2 = "+set2.Count);
set2.Clear();
Console.WriteLine("Count of HashSet2 (updated) = "+set2.Count);
}
}Output
This will produce the following output −
Elements in HashSet1... A B C D E F G H Elements in HashSet2... (Enumerator iterating through HashSet) John Jacob Ryan Tom Andy Tim Steve Mark Is HashSet1 equal to HashSet2? = False Count of HashSet2 = 8 Count of HashSet2 (updated) = 0
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("AB");
set1.Add("CD");
set1.Add("EF");
set1.Add("AB");
set1.Add("IJ");
set1.Add("KL");
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("KL");
Console.WriteLine("Elements in HashSet2... (Enumerator iterating through HashSet)");
HashSet<string>.Enumerator demoEnum = set2.GetEnumerator();
while (demoEnum.MoveNext()) {
string res = demoEnum.Current;
Console.WriteLine(res);
}
Console.WriteLine("Is set1 a superset of set2? "+set1.IsSupersetOf(set2));
}
}Output
This will produce the following output −
Elements in HashSet1 AB CD EF IJ KL OP Elements in HashSet2... (Enumerator iterating through HashSet) EF KL Is set1 a superset of set2? True
Updated on: 06-Dec-2019
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