获取ConcurrentDictionary中ConcurrentBag项目的计数

using System;
using System.Collections.Concurrent;

class Program
{
    static void Main()
    {
        // 创建一个 ConcurrentDictionary，其值是 ConcurrentBag<int> 类型
        var dictionary = new ConcurrentDictionary<string, ConcurrentBag<int>>();

        // 添加一些数据
        dictionary.TryAdd("bag1", new ConcurrentBag<int> { 1, 2, 3 });
        dictionary.TryAdd("bag2", new ConcurrentBag<int> { 4, 5 });

        // 获取 "bag1" 对应的 ConcurrentBag 中的项目数量
        if (dictionary.TryGetValue("bag1", out var bag))
        {
            int count = bag.Count;
            Console.WriteLine($"The count of items in 'bag1' is: {count}");
        }
        else
        {
            Console.WriteLine("Key 'bag1' not found in the dictionary.");
        }
    }
}