using System;
using System.Text.RegularExpressions;
public class Example
{
public static void Main()
{
string pattern = @"^([2-3]{1})([0-9]{2})(0[1-9]|1[012])(0[1-9]|[1-2][0-9]|3[0-1])(0[1-4]|[1-2][1-9]|3[1-5]|88)[0-9]{3}([0-9]{1})[0-9]{1}$";
string input = @"28311210102571";
Match m = Regex.Match(input, pattern);
Console.WriteLine("'{0}' found at index {1}", m.Value, m.Index);
}
}
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for C#, please visit: https://msdn.microsoft.com/en-us/library/system.text.regularexpressions.regex(v=vs.110).aspx