using System;

using System.Text.RegularExpressions;

using System.Globalization;

public class Program

{

    public static void Main()

    {

        var str = "2d30m";

        // d matches both 1 and 2 digit days

        // \d means literal "d"

        // m matches both 1 and 2 digit minutes

        // \m is literal "m"

        var timeSpan = TimeSpan.ParseExact(str, @"d\dm\m", CultureInfo.InvariantCulture);

        Console.WriteLine(timeSpan);

    }

}