多线程下载，可以任意把文件分成多份下载，下载完成后，合并成一个完整的文件-vs.net

Csharp写的读取当前窗口进程名称的源代码，可作为系统监控的组成部分，用来开发进程监控。-The Csharp write the source code to read the name of the current window process, can be used to develop as an integral part of system monitoring, process monitoring