Return Hypotenuse (Exercise)

using System;

class ConsoleTests
{
    static void Main()
    {
        double first = double.Parse(Console.ReadLine());
        double second = double.Parse(Console.ReadLine());
        ReturnHypotenuse(first,second);
    }

    static void ReturnHypotenuse(double a, double b)
    {
        Console.WriteLine(Math.Sqrt(a * a + b * b));
    }
}