Validates the local 4 digit phone number with regular expression : Match « Regular Expressions « C# / C Sharp

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C# / C Sharp » Regular Expressions » Match Screenshots  Validates the local 4 digit phone number with regular expression   //Microsoft Public License (Ms-PL) //http://c4fdevkit.codeplex.com/license using System; using System.Collections.Generic; using System.Text; using System.Text.RegularExpressions; namespace C4F.DevKit.WebServices {     /// <summary>     /// Provides useful methods like conversion methods.     /// </summary>     public static class Utility     {         /// <summary>         /// Validates the local 4 digit phone number         /// </summary>         /// <param name="phone">Phone number to be validated</param>         /// <returns>True, if phone number is valid</returns>         public static bool ValidateLocalPhoneNumber(string phone)         {             if (String.IsNullOrEmpty(phone))                 return false;             return Regex.IsMatch(phone, "^[0-9]{4}$");         }     } }        Related examples in the same category 1. Regular expressions: Match 2. Use regualr expression to check if a string is a GUID 3. Count lines in a string with regular expression 4. Validates the phone number with regular expression 5. Validates the area code with regular expression 6. Validates the exchange code with regular expression 7. Get Area Code by using Regular expression 8. Format Phone Number 9. Clean Telephone Number with Regular expression 10. Remove Nulls with Regex 11. Provides static validation methods for strings.