Tree.cs

using System;
using System.Text;

namespace Tree
{
    class Program
    {
        static void Main(string[] args)
        {
            var h = 32;
            var w = 50d;
            var center = w / 2;


            var sb = new StringBuilder();
            for (var i = 0; i < h * w; i++)
            {
                var posY = i / w;
                var posX = (int)Math.Round((posY - (int)posY) * w);

                // Trunk.
                if (posX - center < 2 && posX - center > -2 && posY > h / 1.5 && posY < h - 1)
                    sb.Append("X");

                // Right border.
                else if (posX == w - 1)
                    sb.Append("=\r\n");

                // Left border.
                else if (posX == 0 || posY == 0 || posY == h - 1)
                    sb.Append("=");

                // Leaves / balls.
                else if (Math.Abs(posX - center) < posY / (float)h * center && posY <= h / 1.5)
                    if (i % (int)(w * 1.39) == 0)
                        sb.Append("O");
                    else 
                        sb.Append("*");

                // Empty space.
                else
                    sb.Append(" ");
            }

            Console.Write(sb.ToString());

            // I especially love this line.
            var a = 1;
        }
    }
}