ASP.NET下载远程Flash如何保存到本地?

怎么把这个流保存成Flash文件呢？？

StreamReader reader = new StreamReader(s);
FileStream fs = new FileStream("保存地址", FileMode.OpenOrCreate, FileAccess.Write);
StreamWriter writer = new StreamWriter(fs);
writer.Write(reader.ReadToEnd());

这么写保存下来的Flash打不开，怎么才能把这个流保存成Flash文件呢？？

解决方案：

WebClient wc = new WebClient(); 
wc.DownloadFile("http://xx.swff",Server.MapPath("~/xx.swf"));