using System;

using System.Linq;

using System.Text;

using System.Text.RegularExpressions;

public class Program

{

    public static void Main()

    {

        string Lines = " If our road signs    Catch your eye          Smile        But don't forget        To buy          Burma Shave    ";

​

        var splitLines = Regex.Split(Lines, @"\s{2,}").Where(s => s != String.Empty);

        // Make signs length of 21

        foreach(string s in splitLines)

        {

            Console.Write(SignFormatter.FormatAsSign(s, 21));

        }

        // Make signs length of 50

        foreach(string s in splitLines)

        {

            Console.Write(SignFormatter.FormatAsSign(s, 50));

        }

        // Make signs length of 100

        foreach(string s in splitLines)

        {

            Console.Write(SignFormatter.FormatAsSign(s, 100));

        }

    }   

}

​

public static class SignFormatter

{

    private static char SignHorizontalSide = '─';

    private static char SignTopLeft = (char)9486; //"┎"

    private static char SignTopRight = (char)9490; //"┒"

    private static char SignBottomLeft = (char)9492; //"└"

    private static char SignBottomRight = (char)9496; //"┘"

    private static char SignVerticalSide = (char)124; //"|"

    public static string FormatAsSign(string input, int length)

    {

        //Needed to adjust for end pipes

        length -= 2;

        Console.WriteLine(length);

        StringBuilder sb = new StringBuilder();

​

        int spaces = length - input.Length;

        Console.WriteLine(spaces);

        int padLeft = spaces / 2 + input.Length;

        Console.WriteLine(padLeft);

        sb.AppendLine($"{SignTopLeft}{new String(SignHorizontalSide, length)}{SignTopRight}");

        sb.AppendLine($"{SignVerticalSide}{input.PadLeft(padLeft).PadRight(length)}{SignVerticalSide}");

        sb.AppendLine($"{SignBottomLeft}{new String(SignHorizontalSide, length)}{SignBottomRight}");

        return sb.ToString();

    }   

}