using System;
using System.Collections.Generic;
using System.Globalization;
using System.Text;
using System.Text.RegularExpressions;
using System.Reflection;
public class MainClass{
public static void Main(){
Regex r1 = new Regex("[0-9]{3}-[0-9]{2}-[0-9]{4}");
string s = "011-01-0111";
string s2 = "abc-01-0111";
Console.WriteLine(r1.ToString());
Console.WriteLine(r1.IsMatch(s));
Console.WriteLine(s2);
Console.WriteLine(r1.IsMatch(s2));
}
}
[0-9]{3}-[0-9]{2}-[0-9]{4}
True
abc-01-0111
False