FileStream流读取

using (FileStream fread = new FileStream(@"C:\Users\kyp10\Desktop\1、复.avi", FileMode.OpenOrCreate, FileAccess.Read))
 {
     using (FileStream fwrite = new FileStream(@"C:\Users\kyp10\Desktop\new.avi", FileMode.OpenOrCreate, FileAccess.Write))
     {
       while (true)
        {
           byte[] buffer = new byte[ *  * ];
           int r = fread.Read(buffer, , buffer.Length);
           if (r == )
           {
            break;
        }
       fwrite.Write(buffer, , r);
    }
    }
}