title: Phone Number validation using Regular Expression validation in c# 2008?
body: <p>I Want to validate the phone number in this format i.e +919981424199,+91231456789,....
  I am using Asp.net +c#2008 for developing web site.for this i have  used the Regular Expression validation control->property->Validation Expression="[0-9]+(,[0-9]+)*".
  But this accept the number as 919981424199,.....
  User may be enter in this way +919981424199,919300951916,so on
  so  i need the validation expression for this type format.The "+" symbol is optional it can be use &amp; it can't.I tried  to solve but still i am searching.please help me to sort out this problem.
  thanks in advance.</p>