Queue.Clear Method in C# Last Updated : 11 Jul, 2025 Suggest changes Share Like Article Like Report This method is used to remove the objects from the Queue. This method is an O(n) operation, where n is the total count of elements. And this method comes under System.Collections namespace. Syntax: public void Clear (); Below given are some examples to understand the implementation in a better way: Example 1: csharp // C# code to illustrate the // Queue.Clear Method using System; using System.Collections; class GFG { // Driver code public static void Main() { // Creating a Queue Queue q = new Queue(); // Inserting the elements into the Queue q.Enqueue(1); q.Enqueue(2); q.Enqueue(2); q.Enqueue(4); // Displaying the count of elements // contained in the Queue before // removing all the elements Console.Write("Total number of elements "+ "in the Queue are : "); Console.WriteLine(q.Count); // Removing all elements from Queue q.Clear(); // Displaying the count of elements // contained in the Queue after // removing all the elements Console.Write("Total number of elements"+ " in the Queue are : "); Console.WriteLine(q.Count); } } Output: Total number of elements in the Queue are : 4 Total number of elements in the Queue are : 0 Example 2: csharp // C# code to illustrate the // Queue.Clear Method using System; using System.Collections; class GFG { // Driver code public static void Main() { // Creating a Queue Queue q = new Queue(); // Inserting the elements into the Queue q.Enqueue("C"); q.Enqueue("C++"); q.Enqueue("Java"); q.Enqueue("PHP"); q.Enqueue("HTML"); q.Enqueue("Python"); // Displaying the count of elements // contained in the Queue before // removing all the elements Console.Write("Total number of elements "+ "in the Queue are : "); Console.WriteLine(q.Count); // Removing all elements from Queue q.Clear(); // Displaying the count of elements // contained in the Queue after // removing all the elements Console.Write("Total number of elements "+ "in the Queue are : "); Console.WriteLine(q.Count); } } Output: Total number of elements in the Queue are : 6 Total number of elements in the Queue are : 0 Reference: https://learn.microsoft.com/en-us/dotnet/api/system.collections.queue.clear?view=netframework-4.7.2 T Twinkl Bajaj Follow Article Tags : C# CSharp-method CSharp-Collections-Namespace CSharp-Collections-Queue 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 C# | Method Parameters 7 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 C# ArrayList Class 7 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 4 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 4 min read C# Multidimensional Indexers 5 min read C# - Overloading of Indexers 3 min read My Profile ${profileImgHtml} My Profile Edit Profile My Courses Join Community Transactions Logout Like