using System;

public class Program

{

    public static void Main()

    {

        string q1 = "5";

        string q2 = "5.0";

        decimal d = 0.0m;

        Decimal.TryParse(q1, out d);

        Console.WriteLine(d.ToString());

        Decimal.TryParse(q1, out d);

        Console.WriteLine(d.ToString("0.0#"));

        Decimal.TryParse(q2, out d);

        Console.WriteLine(d.ToString());

    }

}