Exam 5. House

namespace _3.House
{
    using System;

    public class House
    {
        public static void Main(string[] args)
        {
            checked
            {
                int numN = int.Parse(Console.ReadLine());
                int lenghtExtDotSeq;
                int lenghtIntDotSeq;
                for (int row = 0; row < numN; row++)
                {
                    // Printing the Roof of House:
                    if (row == 0)
                    {
                        string dotStr = new string('.', numN / 2);
                        Console.WriteLine("{0}{1}{0}", dotStr, '*');
                    }
                    else if (row == numN / 2)
                    {
                        Console.WriteLine(new string('*', numN));
                    }
                    else if (row < numN / 2)
                    {
                        lenghtExtDotSeq = (numN / 2) - row;
                        string externalDotSeq = new string('.', lenghtExtDotSeq);
                        lenghtIntDotSeq = numN - (2 * lenghtExtDotSeq) - 2;
                        string internalDotSeq = new string('.', lenghtIntDotSeq);
                        Console.WriteLine("{0}{1}{2}{1}{0}", externalDotSeq, '*', internalDotSeq);
                    }
                    else if (row == numN - 1)
                    {
                        // Printing the Floor of House:
                        lenghtExtDotSeq = numN / 4;
                        string externalDotSeq = new string('.', lenghtExtDotSeq);
                        lenghtIntDotSeq = numN - (2 * lenghtExtDotSeq) - 2;
                        string intBottomSeq = new string('*', numN - (2 * lenghtExtDotSeq));
                        Console.WriteLine("{0}{1}{0}", externalDotSeq, intBottomSeq);
                    }
                    else if (row > numN / 2 && row + 1 < numN)
                    {
                        lenghtExtDotSeq = numN / 4;
                        string externalDotSeq = new string('.', lenghtExtDotSeq);
                        lenghtIntDotSeq = numN - (2 * lenghtExtDotSeq) - 2;
                        string internalDotSeq = new string('.', lenghtIntDotSeq);
                        Console.WriteLine("{0}{1}{2}{1}{0}", externalDotSeq, '*', internalDotSeq);
                    }
                }
            }
        }
    }
}