System.Collections.Queue.Contains C# (CSharp) Method

        public virtual bool Contains(Object obj)
        {
            int index = _head;
            int count = _size;

            while (count-- > 0)
            {
                if (obj == null)
                {
                    if (_array[index] == null)
                        return true;
                }
                else if (_array[index] != null && _array[index].Equals(obj))
                {
                    return true;
                }
                index = (index + 1) % _array.Length;
            }

            return false;
        }

        public void runQueue()
        {
            // Create a queue
            // Using Queue class
            System.Collections.Queue my_queue = new System.Collections.Queue();

            // Adding elements in Queue
            // Using Enqueue() method
            my_queue.Enqueue("GFG");
            my_queue.Enqueue("Geeks");
            my_queue.Enqueue("GeeksforGeeks");
            my_queue.Enqueue("geeks");
            my_queue.Enqueue("Geeks123");

            Console.WriteLine("Total elements present in my_queue: {0}",
                              my_queue.Count);

            // Checking if the element is
            // present in the Queue or not
            if (my_queue.Contains("GeeksforGeeks") == true)
            {
                Console.WriteLine("Element available...!!");
            }
            else
            {
                Console.WriteLine("Element not available...!!");
            }

            // Obtain the topmost element of my_queue
            // Using Dequeue method
            Console.WriteLine("Topmost element of my_queue"
                              + " is: {0}", my_queue.Dequeue());


            Console.WriteLine("Total elements present in my_queue: {0}",
                              my_queue.Count);

            // Obtain the topmost element of my_queue
            // Using Peek method
            Console.WriteLine("Topmost element of my_queue is: {0}",
                              my_queue.Peek());
            // After Dequeue method
            Console.WriteLine("Total elements present in my_queue: {0}",
                              my_queue.Count);

            // Remove all the elements from the queue
            my_queue.Clear();

            // After Clear method
            Console.WriteLine("Total elements present in my_queue: {0}",
                              my_queue.Count);

            Console.ReadLine();
        }