Calculate/ConsoleApp1/Calculate.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApp1
{
    public class Calculate
    {
        public static double Sum(double x,double y)
        {
            return x + y;
        }

        public static double Subtraction(double x, double y)
        {
            return x - y;
        }

        public static double Multiplication(double x, double y)
        {
            return x * y;
        }

        public static double Division(double x, double y)
        {
            return x / y;
        }

        public static double Exponentiation(double x, double y)
        {
            if(y != 0)
            {
                double result = x;
                for (int i = 1; i < y; i++)
                {
                    result = result * x;
                }
                return result;
            }
            else
            {
                return 1;
            }

        }
    }
}