Use regular to verify a date
using System; using System.Text.RegularExpressions; class RegexMatches { public static void Main() { Regex expression = new Regex( @"J.*\d[0-35-9]-\d\d-\d\d" ); string string1 = "Jane's Birthday is 05-12-75\n" + "Jave's Birthday is 11-04-78\n" + "John's Birthday is 04-28-73\n" + "Joe's Birthday is 12-17-77"; foreach ( Match myMatch in expression.Matches( string1 ) ) Console.WriteLine( myMatch ); } }