匿名文件或已知文件转化为另外的已知文件

WebClient wc = new WebClient();
FileStream fs = new FileStream(“文件地址+文件名+或拓展名”, FileMode.Open, FileAccess.Read);
byte[] bt = new byte[fs.Length];
fs.Read(bt, 0, bt.Length);
wc.UploadData(filepath, "PUT", bt);