IsoscelesTriangle

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

    class IsoscelesTriangle
    {
        static void Main(string[] args)
        {
            //This program is changed a bit. It allows the user to choose the height of the triangle.
            //For output with exactly 9 symbols - as it is in the task, you can enter 4 for height.
            //The code is devided in three logical parts - first one prints the edge, the second one
            //shows the lines between the edge and the base and the last one displays the base of the triangle.
            try
            {
                Console.OutputEncoding = Encoding.UTF8; // This code allows correct output for symbols
                char symbol = '\x00A9';
                byte triangleHeight;
                //The following loop guarantees minimal height because it has to be at least 3
                do
                {
                    Console.Write("Enter height of the triangle: ");
                    triangleHeight = byte.Parse(Console.ReadLine());
                } while (triangleHeight <= 2);

                int numberSymbolsBase = triangleHeight; // This is the number of symbols for the base without spaces

                if (triangleHeight * 2 > Console.BufferWidth || triangleHeight > Console.BufferHeight)
                {
                    Console.SetBufferSize(2 * triangleHeight, triangleHeight + 5);
                    //This code sets the size of the buffer according to the dimensions of the triangle,
                    //but only if needed
                }

                // Edge of the triangle
                string spacesBeforeEdge = new string(' ', triangleHeight - 1);
                string edge = spacesBeforeEdge + symbol;
                Console.WriteLine(edge);

                // Lines Between the edge and the base of the triangle
                int spacesBetweenCount = 1; // This variable is used for the speces in the triangle
                int spacesBeforeCount = triangleHeight - 2; //Spaces before each line of symbols
                for (int i = 1; i <= triangleHeight - 2; i++)
                {
                    string spacesBefore = new string(' ', spacesBeforeCount);
                    spacesBeforeCount--;
                    string spacesBetween = new string(' ', spacesBetweenCount);
                    spacesBetweenCount = spacesBetweenCount + 2;
                    string currentLine = spacesBefore + symbol + spacesBetween + symbol;
                    Console.WriteLine(currentLine);
                }

                // Base of the triangle
                for (int i = 1; i <= numberSymbolsBase; i++)
                {
                    Console.Write(symbol + " ");
                }
                Console.WriteLine();
            }
            catch (FormatException)
            {

                Console.WriteLine("Wrong format for height."); ;
            }
            catch (OverflowException)
            {
                Console.WriteLine("You have entered too big or negative number for height.");
            }

        }
    }