Pravoygalnik

using System;


    class Program
    {
        static void Main(string[] args)
        {


            string[,] river = new string[3,7];

            river[0, 0] = "┌"; river[0, 1] = "─"; river[0, 2] = "─"; river[0, 3] = "─"; river[0, 4] = "─";  river[0, 5] = "─"; river[0, 6] = "┐";
            river[1, 0] = "│"; river[1, 1] = " "; river[1, 2] = " "; river[1, 3] = " "; river[1, 4] = " "; river[1, 5] = " "; river[1, 6] = "│";
            river[2, 0] = "└"; river[2, 1] = "─"; river[2, 2] = "─"; river[2, 3] = "─"; river[2, 4] = "─";  river[2, 5] = "─"; river[2, 6] = "┘";

            for(int i = 0 ; i < 3 ; i ++){

                    for(int j = 0 ; j < 7 ; j++){

                        Console.Write(river[i,j]);

                    }
                Console.WriteLine();


            }




            }
    }