从C＃读取SWF文件代码

I have a site that accepts flash files to be uploaded in my site and i need to check the SWF file uploaded to check for certain code if it exists or not to put it in the SWF file so i need to read or deassembly the SWF file and read its code from C#.Net is there any way to do that ?I have a site that accepts flash files to be up