03. Операции между числа

using System;

namespace _03.Операции_между_числа
{
    class Program
    {
        static void Main()
        {
            var n1 = double.Parse(Console.ReadLine());
            var n2 = double.Parse(Console.ReadLine());
            string operand = Console.ReadLine();

            if (operand=="+")
            {
                var sum = n1 + n2;
                var even = (sum % 2 == 0);

                if (even)
                    Console.WriteLine("{0} {1} {2} = {3} - even ", n1, operand, n2, sum);
                else
                {
                    Console.WriteLine("{0} {1} {2} = {3} - odd ", n1, operand, n2, sum);
                }
            }
            else if (operand == "-")
            {
                var sum = n1 - n2;
                var even = (sum % 2 == 0);

                if (even)
                    Console.WriteLine("{0} {1} {2} = {3} - even ", n1, operand, n2, sum);
                else
                {
                    Console.WriteLine("{0} {1} {2} = {3} - odd ", n1, operand, n2, sum);
                }
            }
            else if (operand == "*")
            {
                var sum = n1 * n2;
                var even = (sum % 2 == 0);

                if (even)
                    Console.WriteLine("{0} {1} {2} = {3} - even ", n1, operand, n2, sum);
                else
                {
                    Console.WriteLine("{0} {1} {2} = {3} - odd ", n1, operand, n2, sum);
                }

            }
            else if (operand == "/")
            {
                var sum = n1 / n2;
                {
                    Console.WriteLine("{0} {1} {2} = {3:f2} ", n1, operand, n2, sum);
                }
                if (n2 == 0)
                {

                    Console.WriteLine("Cannot divide {0} by zero", n1);
                }

            }
            if (operand == "%")
            {
                var sum = n1 % n2;
                Console.WriteLine("{0} {1} {2} = {3} ", n1, operand, n2, sum);

                if (n2 == 0)
                {

                    Console.WriteLine("Cannot divide {0} by zero", n1);
                }

            }


        }
    }
}