Remove element at specified index of Collection in C#

To remove element at specified index of Collection, the code is as follows −

Example

 Live Demo

using System; using System.Collections.ObjectModel; public class Demo {    public static void Main() {       Collection<string> col = new Collection<string>();       col.Add("Andy");       col.Add("Kevin");       col.Add("John");       col.Add("Kevin");       col.Add("Mary");       col.Add("Katie");       col.Add("Barry");       col.Add("Nathan");       col.Add("Mark");       Console.WriteLine("Count of elements = "+ col.Count);       Console.WriteLine("Iterating through the collection...");       var enumerator = col.GetEnumerator();       while (enumerator.MoveNext()) {          Console.WriteLine(enumerator.Current);       }       col.RemoveAt(3);       Console.WriteLine("Count of elements (updated) = "+ col.Count);       Console.WriteLine("Iterating through the collection... (updated)");       enumerator = col.GetEnumerator();       while (enumerator.MoveNext()) {          Console.WriteLine(enumerator.Current);       }    } }

Output

This will produce the following output −

Count of elements = 9 Iterating through the collection... Andy Kevin John Kevin Mary Katie Barry Nathan Mark Count of elements (updated) = 8 Iterating through the collection... (updated) Andy Kevin John Mary Katie Barry Nathan Mark

Example

Let us see another example −

 Live Demo

using System; using System.Collections.ObjectModel; public class Demo {    public static void Main() {       Collection<string> col = new Collection<string>();       col.Add("One");       col.Add("Two");       col.Add("Three");       col.Add("Four");       col.Add("Five");       col.Add("Six");       Console.WriteLine("Count of elements = "+ col.Count);       Console.WriteLine("Iterating through the collection...");       var enumerator = col.GetEnumerator();       while (enumerator.MoveNext()) {          Console.WriteLine(enumerator.Current);       }       col.RemoveAt(1);       col.RemoveAt(2);       col.RemoveAt(3);       Console.WriteLine("Count of elements (updated) = "+ col.Count);       Console.WriteLine("Iterating through the collection... (updated)");       enumerator = col.GetEnumerator();       while (enumerator.MoveNext()) {          Console.WriteLine(enumerator.Current);       }    } }

Output

This will produce the following output −

Count of elements = 6 Iterating through the collection... One Two Three Four Five Six Count of elements (updated) = 3 Iterating through the collection... (updated) One Three Five