【C#】线程数量锁

//线程安全的先进先出队列
private readonly System.Collections.Concurrent.ConcurrentQueue<string> infoQueue = new();
//同步限制工具
readonly SemaphoreSlim _lock = new(1, 1);
void Msg(string info)
{
    infoQueue.Enqueue(info);
    Task.Run(MsgCore);
}
async void MsgCore()
{
    //等待释放钥匙
    await _lock.WaitAsync();
    {
        while (infoQueue.TryDequeue(out var text))
        {
            await Dispatcher.InvokeAsync(() => state_TextBlock.Text = text);
            await Task.Delay(5000);
            await Dispatcher.InvokeAsync(() => state_TextBlock.Text = string.Empty);
        }
    }
    //释放钥匙
    _lock.Release();
}