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Best Way to Validate Email Addresses in C#

By , 6th July 2012 in C#

It used to be that a RegEx was the best method for validate email addresses in C#, but with all the new Top Level Domains (TLD's) flying around and new ones being released, this is becoming an increasingly difficult task.

So instead, why not let Microsoft do the hard work of validate email addresses in C#? Their .Net library gets updated regularly with all the new validation methods automatically across all platforms (forms, asp.net etc..) meaning you need only call their methods from you code and you are up to date.

Instead of using a regular expression to validate an email address, you can use the System.Net.Mail.MailAddress class. To determine whether an email address is valid, pass the email address to the MailAddress.MailAddress(String) class constructor.

Source: Microsoft ASP.Net Website

  1. public bool IsEmailValid(string emailaddress)
  2. {
  3. try
  4. {
  5. MailAddress m = new MailAddress(emailaddress);
  6. return true;
  7. }
  8. catch (FormatException)
  9. {
  10. return false;
  11. }
  12. }
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