I am developing window phone 7 application in silverlight. I am new to the window phone 7 application. I have the long value in String format as follows
String A
A Long value stores more data than an Integer 32 value, so if you want to keep all 15 digits you can't convert to a standard Integer.
But aside from 'which' datatype you want to use, the Convert class should help you i.e. Convert.ToInt64 which may do what you want