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i need a code that will upload phone numbers, display the numbers and if a number is a valid phone number, send sms message to the number.

Moved from OP's "solution":

namespace _11_RegularExpressions
    class Class1
        static void Main(string[] args)
            Regex phoneExp = new Regex(@"^(234[7|8][0|1][2-9])([0-9]{7}$");
            string input;
            Console.Write("Enter a phone number: ");
            input = Console.ReadLine();
            while (phoneExp.Match(input).Success == false)
                Console.WriteLine("Invalid input. Try again.");
                Console.Write("Enter a phone number: ");
                input = Console.ReadLine();

Updated 21-Jun-11 7:30am
ambarishtv 21-Jun-11 9:24am

Your solution is to pick up your C# textbooks and read them. Then write some code. When that code has bugs, ask us regarding those bugs and we'll be glad to help you. We will NOT do your homework for you.
Manfred Rudolf Bihy 21-Jun-11 12:30pm
Agreed! 5+
How do you want send SMS ? I have code to do it with Google Voice and php I did integrated with MS Access you can do it with C#
Google voice api

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