C# program to remove an item from Set

Firstly, declare a HashSet and add elements −

var names = new HashSet<string>(); names.Add("Tim"); names.Add("John"); names.Add("Tom"); names.Add("Kevin");

To remove an element, use RemoveWhere.

names.RemoveWhere(x => x == "John");

Let us see the complete example −

Example

using System; using System.Collections.Generic; public class Program {    public static void Main() {       var names = new HashSet < string > ();       names.Add("Tim");       names.Add("John");       names.Add("Tom");       names.Add("Kevin");       Console.WriteLine("Initial Set...");       foreach(var val in names) {          Console.WriteLine(val);       }       names.RemoveWhere(x => x == "John");       Console.WriteLine("Set after removing an element...");       foreach(var val in names) {          Console.WriteLine(val);       }    } }