Simple command line tool for generating HTML from Markdown

PipeDownWIthArgs

using CommonMark;
using System;
using System.IO;
using System.Linq;

namespace PipeDown
{
    class Program
    {
        static void Main(string[] args)
        {
            if (args.Length == 0)
            {
                Console.WriteLine("Provide a filename to parse.");
                return;
            }

            var filePairs = args
                .Where(File.Exists)
                .Select(arg =>
                {
                    var info = new FileInfo(arg);

                    return new
                    {
                        Source = info.FullName,
                        Target = info.FullName.Replace(info.Extension, ".html"),
                    };
                }).ToList();
            
            if (!filePairs.Any())
            {
                Console.WriteLine("No file found.");
                return;
            }

            foreach (var item in filePairs)
            {
                using (var reader = new StreamReader(item.Source))
                using (var writer = new StreamWriter(item.Target))
                {
                    CommonMarkConverter.Convert(reader, writer);
                }
            }
        }
    }
}