console application for validating user input for given patt

Try this:

using System;

using System.Text.RegularExpressions;

class Program

{

static string regExp1 = @"\(\d{3}\)-\(\d{4}\)-\(\d{3}\)-\(\d{3}\)";

static string regExp2 = @"\(\d{3}\)-\(\d{3}\)-\(\d{4}\)-\(\d{3}\)";

static void Main()

{

while(true)

{

Console.Write("Enter pattern or q to quit : ");

string pattern = Console.ReadLine();

if (pattern.ToLower() == "q") break;

bool isValid = Validate(pattern);

if(isValid)

{

Console.WriteLine("{0} is correct", pattern);

}

else

{

Console.WriteLine("{0} is wrong", pattern);

}

static bool Validate(string pattern)

{

return Regex.IsMatch(pattern, regExp1) || Regex.IsMatch(pattern, regExp2);

}

The input/output is:

Enter pattern or q to quit : (123)-(3215)-(874)-(789)

(123)-(3215)-(874)-(789) is correct

Enter pattern or q to quit : (323)-(678)-(6587)-(654)

(323)-(678)-(6587)-(654) is correct

Enter pattern or q to quit : (312)-(344)-(543)-(453)

(312)-(344)-(543)-(453) is wrong

Enter pattern or q to quit : q

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