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Email address regular expression

Posted By:      Posted Date: September 15, 2010    Points: 0   Category :.NET Framework
I used the function below to validate email addresses. // Function to test for valid email address.         public static bool IsValidEmailAddress(String emailAddress)         {             Regex regex = new Regex(@"^[_a-zA-Z0-9-]+(\.[_a-zA-Z0-9-]+)*@[a-zA-Z0-9-]+(\.[a-zA-Z0-9-]+)*\.(([0-9]{1,3})|([a-zA-Z]{2,3})|(aero|coop|info|museum|name))$");             Match match = regex.Match(emailAddress);             return match.Success;         } This regular expression works for amy.charles@test.com, but not robert.o'neil@test.com. Can anyone help me to modify the regulation expression, making it to valid for robert.o'neil@test.com Thanks in advance!

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