The Greatest Out Of 5 Numbers

using System;
class FindTheGreatestOutOf5Nums
{
  static void Main()
  {
    //Write a program that finds the greatest of given 5 variables.

    Console.Write("Please enter the first real number:");
    decimal firstNum = decimal.Parse(Console.ReadLine());
    Console.Write("Please enter the second real number:");
    decimal secondNum = decimal.Parse(Console.ReadLine());
    Console.Write("Please enter the third real number:");
    decimal thirdNum = decimal.Parse(Console.ReadLine());
    Console.Write("Please enter the fourth ot real number:");
    decimal fourthNum = decimal.Parse(Console.ReadLine());
    Console.Write("Please enter the fifth real number:");
    decimal fifthNum = decimal.Parse(Console.ReadLine());

    decimal biggestNum = decimal.MinValue;

    if (firstNum > biggestNum)
    {
      biggestNum = firstNum;
    }
    if (secondNum > biggestNum)
    {
      biggestNum = secondNum;
    }
    if (thirdNum > biggestNum)
    {
      biggestNum = thirdNum;
    }
    if (fourthNum > biggestNum)
    {
      biggestNum = fourthNum;
    }
    if (fifthNum > biggestNum)
    {
      biggestNum = fifthNum;
    }

    Console.WriteLine("The biggest number is {0}", biggestNum);
  }
}