using System;

public class Program

{

    static private double add(double a, double b, double c)

    {

    double sum = a+b+c;

        return sum;

    }

    public static void Main()

    {

        {

    Console.WriteLine("Please enter three numbers you would like to add");

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

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

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

Console.WriteLine(add(x,y,z));

Console.ReadLine();

}

​

    }

}

​