C# | Getting an enumerator for the entire ArrayList Last Updated : 02 Jul, 2019 Comments Improve Suggest changes Like Article Like Report ArrayList.GetEnumerator Method is used to get an enumerator for the entire ArrayList. Syntax: public virtual System.Collections.IEnumerator GetEnumerator (); Return Value: It returns an IEnumerator for the entire ArrayList. Below programs illustrate the use of above-discussed method: Example 1: CSharp // C# code to get an enumerator // for the entire ArrayList using System; using System.Collections; class GFG { // Driver code public static void Main() { // Creating an ArrayList ArrayList myList = new ArrayList(); // adding elements in myList myList.Add("Geeks"); myList.Add("GFG"); myList.Add("C#"); myList.Add("Tutorials"); // To get an Enumerator // for the ArrayList IEnumerator enumerator = myList.GetEnumerator(); // If MoveNext passes the end of the // collection, the enumerator is positioned // after the last element in the ArrayList // and MoveNext returns false. while (enumerator.MoveNext()) { Console.WriteLine(enumerator.Current); } } } Output: Geeks GFG C# Tutorials Example 2: CSharp // C# code to get an enumerator // for the entire ArrayList using System; using System.Collections; class GFG { // Driver code public static void Main() { // Creating an ArrayList ArrayList myList = new ArrayList(); // adding elements in myList myList.Add(14); myList.Add(45); myList.Add(78); myList.Add(57); // To get an Enumerator // for the ArrayList IEnumerator enumerator = myList.GetEnumerator(); // If MoveNext passes the end of the // collection, the enumerator is positioned // after the last element in the ArrayList // and MoveNext returns false. while (enumerator.MoveNext()) { Console.WriteLine(enumerator.Current); } } } Output: 14 45 78 57 Note: The foreach statement of the C# language hides the complexity of the enumerators. Therefore, using foreach is recommended, instead of directly manipulating the enumerator. Enumerators can be used to read the data in the collection, but they cannot be used to modify the underlying collection. Current returns the same object until either MoveNext or Reset is called. MoveNext sets Current to the next element. An enumerator remains valid as long as the collection remains unchanged. If changes are made to the collection, such as adding, modifying, or deleting elements, the enumerator is irrecoverably invalidated and its behavior is undefined. This method is an O(1) operation. Reference: https://docs.microsoft.com/en-us/dotnet/api/system.collections.arraylist.getenumerator?view=netframework-4.7.2 Comment More infoAdvertise with us Next Article C# | Getting an enumerator for the entire ArrayList K Kirti_Mangal Follow Improve Article Tags : C# CSharp-method CSharp-Collections-Namespace CSharp-Collections-ArrayList Similar Reads C# | Getting an enumerator for a range of elements in the ArrayList ArrayList.GetEnumerator(Int32, Int32) method is used to get an enumerator for a range of elements in the ArrayList. Syntax: public virtual System.Collections.IEnumerator GetEnumerator (int index, int count); Parameters: index: It is the zero-based starting index of type Int32 of the ArrayList sectio 3 min read C# | Remove all elements from the ArrayList ArrayList represents an ordered collection of an object that can be indexed individually. It is basically an alternative to an array. It also allows dynamic memory allocation, adding, searching and sorting items in the list. ArrayList.Clear method is used to remove all the elements from the ArrayLis 3 min read C# | Array.GetEnumerator Method This method is used to return an IEnumerator for the Array. Syntax: public System.Collections.IEnumerator GetEnumerator (); Return Value: This method returns an IEnumerator for the Array. Below programs illustrate the use of Array.GetEnumerator Method: Example 1: CSHARP // C# program to demonstrate 2 min read C# | Getting a subset of the elements from the source ArrayList ArrayList.GetRange(Int32, Int32) Method is used to get an ArrayList which will represent a subset of the elements in the source ArrayList. Syntax: public virtual System.Collections.ArrayList GetRange (int index, int count); Parameters: index: It is of Int32 type and represents the zero-based ArrayLi 3 min read How to create the ArrayList in C# ArrayList() constructor is used to initialize a new instance of the ArrayList class which will be empty and will have the default initial capacity. ArrayList represents an ordered collection of an object that can be indexed individually. It is basically an alternative to an array. It also allows dyn 2 min read Like