2D Task

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

namespace _2D_RectangleArea
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.Write("x1= ");
            var x1 = double.Parse(Console.ReadLine());
            Console.Write("y1= ");
            var y1 = double.Parse(Console.ReadLine());
            Console.Write("x2= ");
            var x2 = double.Parse(Console.ReadLine());
            Console.Write("y2= ");
            var y2 = double.Parse(Console.ReadLine());
            var area = (x1 - x2) * (y2 - y1);
            var perimeter = (x1 - x2) +(y2 - y1)+ (x1 - x2) + (y2 - y1);
            {
                Console.Write("area= ");
                Console.WriteLine(area);
                Console.Write("perimeter= ");
                Console.WriteLine(perimeter);
            }
        }
    }
}