Diamont - V3

using System;

namespace p10_Diamond_v3
{
    class p10_Diamond_v3
    {
        static void Main()
        {
            int num = int.Parse(Console.ReadLine());
            string insertString = "";
            string star2 = "*";
            int beg, mid;
            bool odd;

            if (num >= 3 && num <= 100)
            {
                if (num % 2 == 1)  // odd number
                {
                    beg = num / 2;
                    odd = true;
                }
                else
                {
                    beg = (num - 1) / 2;  // even number
                }

                for (int raw = beg; raw >= (-beg); raw--)
                {
                    int rawAbs = Math.Abs(raw);

                    if (odd = true && rawAbs == beg)
                    {
                        star2 = "";
                    }
                    else if (odd = true && rawAbs != beg)
                    {
                        star2 = "*";
                    }

                    if (num % 2 == 0)
                    {
                        insertString = new string('-', (beg - rawAbs) * 2) + "*";
                    }
                    else
                    {
                        mid = ((beg - rawAbs) * 2) - 1;
                        if (mid < 0)
                            mid = 0;
                        insertString = new string('-', mid) + star2;
                    }
                    Console.WriteLine("{0}*{1}{0}", new string('-', rawAbs), insertString);
                }
            }
            if (num == 1 || num == 2)
            {
                Console.WriteLine("{0}", new string('*', num));
            }
        }
    }
}