C# | ArrayList whose elements are copies of the specified value Last Updated : 11 Jul, 2025 Comments Improve Suggest changes Like Article Like Report ArrayList.Repeat(Object, Int32) Method is used to return an ArrayList whose elements are copies of the specified value. Or in other words, this method is used when you want to repeat a specified element in the ArrayList. This method is an O(n) operation, where n is the number of times item should be copied. Syntax: public static ArrayList Repeat (object item, int count); Parameters: item: It is an Object to copy multiple times in the new ArrayList. The value can be null. count: It counts the number of times item should be copied. Return Value: This method returns an ArrayList with a count number of elements, all of which are copies of the item. Exception: If the value of count is less than zero then this method will give ArgumentOutOfRangeException. Below given are some examples to understand the implementation in a better way: Example 1: CSharp // C# program to illustrate the use of // ArrayList.Repeat(Object, Int32) Method using System; using System.Collections; class GFG { // Main method public static void Main() { // Create and repeat the element // of ArrayList "mylist" ArrayList mylist = ArrayList.Repeat("GFG", 6); // Display element foreach(Object ob in mylist) { Console.WriteLine(ob); } // Display and count the total number of element Console.WriteLine("The count of the item is : {0}", mylist.Count); } } Output: GFG GFG GFG GFG GFG GFG The count of the item is : 6 Example 2: CSharp // C# program to illustrate the use of // ArrayList.Repeat(Object, Int32) Method using System; using System.Collections; class GFG { // Main method public static void Main() { // Create and repeat the // element of mylist ArrayList // this will give runtime error // as count is less than 0 ArrayList mylist = ArrayList.Repeat(43, -1); // Display element foreach(Object ob in mylist) { Console.WriteLine(ob); } // Display and count the total number of element Console.WriteLine("The count of the item is : {0}", mylist.Count); } } Runtime Error: Unhandled Exception: System.ArgumentOutOfRangeException: Non-negative number required. Parameter name: count Reference: https://learn.microsoft.com/en-us/dotnet/api/system.collections.arraylist.repeat?view=netframework-4.7.2 Create Quiz Comment A ankita_saini Follow 0 Improve A ankita_saini Follow 0 Improve Article Tags : C# CSharp-method CSharp-Collections-Namespace CSharp-Collections-ArrayList Explore IntroductionC# Tutorial 2 min read Introduction to .NET Framework 6 min read C# .NET Framework (Basic Architecture and Component Stack) 6 min read C# Hello World 2 min read Common Language Runtime (CLR) in C# 4 min read FundamentalsC# Identifiers 2 min read Data Types in C# 6 min read C# Variables 4 min read C# Literals 5 min read Operators in C# 7 min read C# Keywords 5 min read Control StatementsC# Decision Making (if, if-else, if-else-if ladder, nested if, switch, nested switch) 5 min read C# Switch Statement 4 min read Loops in C# 4 min read C# Jump Statements (Break, Continue, Goto, Return and Throw) 4 min read OOP ConceptsClass and Objects in C# 4 min read Constructors in C# 5 min read C# Inheritance 3 min read Encapsulation in C# 2 min read C# Abstraction 4 min read MethodsMethods in C# 4 min read Method Overloading in C# 4 min read Method Parameters in C# 4 min read Method Overriding in C# 7 min read Anonymous Method in C# 2 min read ArraysArrays in C# 6 min read Jagged Arrays in C# 4 min read Array Class in C# 5 min read How to Sort an Array in C# | Array.Sort() Method Set - 1 8 min read How to find the rank of an array in C# 2 min read ArrayListArrayList in C# 6 min read ArrayList Class in C# 4 min read C# | Array vs ArrayList 2 min read StringStrings in C# 6 min read C# Verbatim String Literal - @ 5 min read C# String Class 9 min read C# StringBuilder 2 min read C# String vs StringBuilder 3 min read TupleC# Tuple 7 min read C# Tuple Class 3 min read C# ValueTuple 7 min read C# ValueTuple Struct 4 min read IndexersC# Indexers 5 min read C# Multidimensional Indexers 5 min read C# - Overloading of Indexers 3 min read Like