Silverlight文件上传下载实现方法(下载保存)

参考：

http://www.easck.com/wsdj-ittech/archive/2009/08/26/1554056.html

http://www.easck.com/wsdj-ittech/archive/2009/08/25/1553534.html

http://www.easck.com/wmt1708/archive/2009/03/07/1405009.html

http://www.easck.com/u/20090918/10/5e41ab52-f514-46b5-ae6a-d69ddb197213.html

http://www.easck.com/wsdj-ittech/archive/2009/08/25/1553534.html

http://www.easck.com/gwazy/archive/2009/04/02/1427781.html

http://www.easck.com/ewyb/archive/2009/12/10/1621020.html

http://www.easck.com/emily1900/archive/2010/06/08/5655726.aspx