在C#中获取“空队列”异常

using System;
using System.Collections.Generic;

class Program
{
    static void Main()
    {
        Queue<int> queue = new Queue<int>();

        // 添加元素到队列
        queue.Enqueue(1);
        queue.Enqueue(2);
        queue.Enqueue(3);

        // 判断队列是否为空
        if (queue.Count > 0)
        {
            // 从队列中获取元素
            int element = queue.Dequeue();
            Console.WriteLine("Dequeued element: " + element);
        }
        else
        {
            Console.WriteLine("Queue is empty.");
        }

        // 再次尝试从空队列中获取元素
        try
        {
            int element = queue.Dequeue();
            Console.WriteLine("Dequeued element: " + element);
        }
        catch (InvalidOperationException ex)
        {
            Console.WriteLine("Exception: " + ex.Message);
        }
    }
}

Dequeued element: 1
Exception: 队列为空。