Find_The_Largest_Pyramidic_ListOfStrings

using System;
using System.Collections.Generic;
using System.Linq;

namespace lab7.Pyramidic
{
    class Program
    {
        static void Main(string[] args)
        {
            int n = int.Parse(Console.ReadLine());
            List<string> saveLines = new List<string>();
            var result = new Dictionary<string, int>();

            for (int i = 0; i < n; i++)                                 //save all inputs
            {
                string inputSequence = Console.ReadLine();
                saveLines.Add(inputSequence);
            }
            int index = 1;
            for (int row = 0; row  < saveLines.Count; row++)                      // start to iterate all letters and save the pyramidic
            {
                for (int column = 0; column <saveLines[row].Length; column ++)
                {
                    string letter = saveLines[row][column].ToString();
                    int size = CountPiramid(saveLines, index, letter);
                    if (!result.ContainsKey(letter))
                    {

                        result.Add(letter, size);
                    }
                    else
                    {
                        if(result[letter] <= size)
                        {
                            result[letter] = size;
                        }
                    }

                }
                index++;
            }
            foreach(var res in result                                          //output the biggest pyramidic
                .OrderByDescending(x =>x.Value)
                .Take(1))

            {
                String letter = res.Key;
                String save = letter + letter;
                int size = res.Value;
                for (int i = 0; i < size; i++)
                {
                    Console.WriteLine(letter);
                    letter += save;
                }
            }

        }
        static int CountPiramid(List<string> inputs,int index,string letter)       // method find the size of pyramidic
        {
            string saveLetter = letter;
            int counter = 1;
            for (int i = index; i < inputs.Count; i++)
            {
                if (inputs[i].Contains(IncreaseLetter(letter, saveLetter)))
                {
                    counter++;
                    letter = letter + saveLetter + saveLetter;
                }
                else
                {
                    break;
                }
            }
            return counter;
        }
        static string IncreaseLetter(string letter,string saveLetter)     //method increase letter(on each row increasing) the base of pyramidic
        {
            letter = letter + saveLetter + saveLetter;

            return letter;
        }
    }
}