aoc/AdventOfCode/Contracts/Day.cs

using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.IO;

namespace AdventOfCode.Contracts
{
    public abstract class Day
    {
        public abstract int Year { get; }
        public abstract int DayNumber { get; }

        private List<string> Output { get; set; } = new List<string>();

        protected void Print(string part, object output) =>
            Output.Add($"{Year} Day {DayNumber} Part {part}: {output}");

        protected void Print(string part, long elapsed, object output) =>
            Output.Add($"{Year} Day {DayNumber} Part {part}: {output} {Environment.NewLine}Time: {elapsed}");

        public void Write() =>
            Console.WriteLine(string.Join(Environment.NewLine, Output));

        public void Execute(bool bigBoi)
        {
            string[] input = File.ReadAllLines($"../../../Input/{Year}/day{DayNumber}.txt");

            Part1(input);
            Part2(input);

            if (bigBoi)
            {
                BigBoi(File.ReadAllLines($"../../../Input/{Year}/BigBoi/day{DayNumber}.txt"));
            }
        }

        public abstract void Part1(string[] input);

        public abstract void Part2(string[] input);

        public abstract void BigBoi(string[] input);
    }
}