How to validate phone no and mail id in window form

Use regular expression validation: http://msdn.microsoft.com/en-us/library/ms996428.aspx[^]
For email you can look around here for example:
http://www.regular-expressions.info/email.html[^]
http://regexlib.com/Search.aspx?k=email&AspxAutoDetectCookieSupport=1[^]
And here for phone numbers (but you will need to tailor it for your acceptable format):
http://regexlib.com/Search.aspx?k=phone[^]