AdventOfCodeDay8.cs

using System;
using System.IO;
using System.Text;
using System.Text.RegularExpressions;

namespace AdventOfCodeDay8
{
	class Program
	{
		static void Main(string[] args)
		{
			 
			var sr = new StreamReader("../../input1.txt"); // select part one or two here.
			string line;
			var total1 = 0;
			var total2 = 0;
			while ((line = sr.ReadLine()) != null)
			{
				total1 += ((line.Length - Regex.Unescape(line).Length) + 2);
				var part2 = "\"" + Escape(line) + "\"";
				total2 += (part2.Length - line.Length);
			}

			Console.WriteLine($"Part 1 Extra Characters: {total1}");
			Console.WriteLine($"Part 2 Extra Characters: {total2}");
		}

		private static string Escape(string s)
		{
			var sb = new StringBuilder();
			foreach (var c in s)
			{
				switch (c)
				{
					case '"':
						sb.Append(@"\""");
						break;
					case '\\':
						sb.Append("\\\\");
						break;
					default:
						sb.Append(c);
						break;
				}
			}

			return sb.ToString();
		}
	}
}