一款用 C# 编写的网络爬虫。用户可以通过设置线程数、线程等待时间，连接超时时间，可爬取文件类型和优先级、下载目录等参数，获得网络上URL,下载得到的数据存储在数据库中。-Using a web crawler written in C#. Users can set the number of threads, thread waiting time, connection time, crawling file types can be Type and priority, the do