gistfile1.txt

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

internal class Program
{
    static void Main(string[] args)
    {
        int lenght = 5;
        int height = 3;
        Console.WriteLine($"Длина = {lenght}\nВысота = {height}");
        Console.WriteLine("--------------------------------------");
        int temp = lenght;
        lenght = height;
        height = temp;
        Console.WriteLine($"Длина = {lenght}\nВысота = {height}");
    }
}