ピラミッド

Program.cs

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

namespace Pyramid {
    public class Program {
        public static void Main(string[] args) {
            Console.OutputEncoding = Encoding.UTF8;
            Console.Out.WriteLine("行数を入力してください");
            string text = Console.In.ReadLine();
            int count = 0;
            if(int.TryParse(text,out count) == false) {
                Console.Out.WriteLine("数値を入力してください");
                return;
            }
            new Pyramid(count).WritePyramid();
        }
    }

    public class Pyramid {

        private List<PyramidRow> rows = new List<PyramidRow>();

        public int RowCount => rows.Count;

        public Pyramid() { }

        public Pyramid(int rowCount) {
            AddRangeRow(rowCount);
        }

        public void AddRow() {
            rows.Add(new PyramidRow(RowCount));
        }

        public void AddRangeRow(int count) {
            for(int i = 0;i < count;i++) {
                AddRow();
            }
        }

        public void RemoveRow() {
            rows.RemoveAt(RowCount - 1);
        }

        public void WritePyramid() {
            foreach(PyramidRow row in rows) {
                row.WriteLine(RowCount);
            }
        }
    }

    public class PyramidRow {

        private int position;

        public PyramidRow(int position) {
            this.position = position;
        }

        public void WriteLine(int totalRowCount) {
            foreach(char c in Enumerable.Repeat(' ',totalRowCount - position - 1)) {
                Console.Out.Write(c);
            }
            foreach(char c in Enumerable.Repeat('*',position * 2 + 1)) {
                Console.Out.Write(c);
            }
            Console.Out.WriteLine();
        }
    }
}