using System;

​

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Please enter one leg.");

        double input1 = double.Parse(Console.ReadLine());

        Console.WriteLine("Please enter the hypotenuse.");

        double input2 = double.Parse(Console.ReadLine());

        double output = leg(input1, input2);

        Console.WriteLine("The leg's value is " +output);

    }

​

    static private double leg(double a, double c)

    {

        double a2 = a * a;

        double c2 = c * c;

        return Math.Sqrt(c2-a2);

    }

} 

​