Url 需要一点修改

Url need little modification

改变

string link =
    "http:\www.nse-india.com\DERIVATIVES\2012\AUG\fo22AUG2012bhav.csv.zip"

到

string link =
    "http://www.nse-india.com/DERIVATIVES/2012/AUG/fo22AUG2012bhav.csv.zip"