Base, C# - rextester

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//Rextester.Program.Main is the entry point for your code. Don't change it.
//Compiler version 4.0.30319.17929 for Microsoft (R) .NET Framework 4.5

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text.RegularExpressions;

namespace Rextester
{
    public class Program
    {
        static double h = 0.0, b = 0.0, a = 0.0;
        static void input ()
        {
        Console.WriteLine("Put the height here ");
        h=double.Parse(Console.ReadLine());
        Console.WriteLine("Put the base here ");
        b=double.Parse(Console.ReadLine());
        }
        static void calculate ()
        {
        a=(h*b);
        }
        static void validate ()
        {
         if ((b>h) && (a>30))
            {
                Console.WriteLine("Tu resultado es: "+ a.ToString());
            }
         else
            {
                Console.WriteLine("Error, Intente con valores màs grandes.");
            }        }    
        public static void Main(string[] args)
        {
            input ();
            calculate ();
            validate ();
        }
    }
}

Show compiler warnings [ - ] Show input
Compilation time: 0,13 sec, absolute running time: 0,09 sec, cpu time: 0,09 sec, average memory usage: 14 Mb, average nr of threads: 3