gistfile1.txt

using System;

class Program
{
    private const char SpaceSign = ' ';
    private const char DotSign = '.';
    private const char XSign = 'X';
    private const char SlashSign = '/';
    private const char BackSlashSign = '\\';
    private const char HashTagSign = '#';

    static void Main()
    {
        int n = int.Parse(Console.ReadLine());
        int d = int.Parse(Console.ReadLine());

        DrawTopPart(n, d);
        DrawMiddleLine(n);
        DrawBottomPart(n, d);
    }

    private static void DrawBottomPart(int n, int d)
    {
        int width = 2 * n + 1;
        int spaceCount = 1;
        int hashCount = n - 1;
        for (int i = 0; i < n; i++)
        {
            Console.Write(new string(HashTagSign, hashCount));
            Console.Write(SlashSign);

            int dotCount = width - 4 - (2 * hashCount) - 2 * d;
            if (dotCount > 0)
            {
                Console.Write(new string(SpaceSign, d));
                Console.Write(SlashSign);
                Console.Write(new string(DotSign, dotCount));
                Console.Write(BackSlashSign);
                Console.Write(new string(SpaceSign, d));
            }
            else
            {
                Console.Write(new string(SpaceSign, spaceCount));
            }

            Console.Write(BackSlashSign);
            Console.WriteLine(new string(HashTagSign, hashCount));

            spaceCount += 2;
            hashCount--;
        }
    }

    private static void DrawTopPart(int n, int d)
    {
        int width = 2 * n + 1;
        int dotCount = width - 4 - (2 * d);
        int spaceCount = width - 2;
        for (int i = 0; i < n; i++)
        {
            Console.Write(new string(HashTagSign, i));
            Console.Write(BackSlashSign);
            if (dotCount > 0)
            {
                Console.Write(new string(SpaceSign, d));
                Console.Write(BackSlashSign);
                Console.Write(new string(DotSign, dotCount));
                Console.Write(SlashSign);
                Console.Write(new string(SpaceSign, d));
            }
            else
            {
                Console.Write(new string(SpaceSign, spaceCount));
            }

            Console.Write(SlashSign);
            Console.WriteLine(new string(HashTagSign, i));

            spaceCount -= 2;
            dotCount -= 2;
        }
    }

    private static void DrawMiddleLine(int n)
    {
        Console.Write(new string(HashTagSign, n));
        Console.Write(XSign);
        Console.WriteLine(new string(HashTagSign, n));
    }
}