Biggest of 5 numbers

using System;

//Write a program that finds the biggest of five numbers by using only five if statements


class BiggestOf5Numbers
{
    static void Main()
    {
        double a = double.Parse(Console.ReadLine());
        double b = double.Parse(Console.ReadLine());
        double c = double.Parse(Console.ReadLine());
        double d = double.Parse(Console.ReadLine());
        double e = double.Parse(Console.ReadLine());

        double biggestNumber = Math.Max(Math.Max(Math.Max(Math.Max(a, b), c), d), e);
        if (biggestNumber == a || biggestNumber == b || biggestNumber == c || biggestNumber == d || biggestNumber == e)
        {
            Console.WriteLine("biggest: " + biggestNumber);
        }
    }
}