Validate Phone Number : Regular Expression « Development Class « C# / C Sharp

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C# / C Sharp » Development Class » Regular Expression Screenshots  Validate Phone Number using System; using System.Text.RegularExpressions; class RegexSubstitution {    public static void Main()    {       string text = "124";       if ( !Regex.Match(text,@"^[1-9]\d{2}-[1-9]\d{2}-\d{4}$" ).Success )       {          Console.WriteLine( "Invalid phone number");       }       } }                     Related examples in the same category 1. Multiple different delimiters 2. Single space split 3. Multiple spaces, using \"[\\s]+\" 4. Single spaces, using () 5. Single spaces, using new Regex("( )") 6. Position and index 7. Regex and letter case 8. ((an)|(in)|(on)) 9. Gr(a|e)y 10. Define groups 'ing', 'in', 'n' 11. Leading space 12. Proper case match 13. Use | to combine different case 14. IP address 15. Multiple spaces, using \" \" 16. Use regular expression to replace chars 17. Use regular to replace strings 18. Use regular to replace word 19. Use regular expression to replace first 3 digits 20. Use regular to split string 21. Validate first name and last name 22. Validate address 23. Validate city name 24. Validate ZIP code 25. Use regular to verify a date 26. HTML Parser