Simple template-base generator

program.cs

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

namespace ConsoleApplication2
{
  class Program
  {
    private static int Main(string[] args)
    {
      if (args.Length < 2)
      {
        Console.WriteLine("Usage:");
        Console.WriteLine(" {0} <path to template> <path to source file>", Path.GetFileName(Assembly.GetEntryAssembly().Location));
        Console.WriteLine();
        return 1;
      }

      var str = File.ReadAllText(args[0]);
      var strBuilder = new StringBuilder(str);
      using (var streamReader = new StreamReader(args[1]))
      {
        while (!streamReader.EndOfStream)
        {
          var a = streamReader.ReadLine();
          if (!string.IsNullOrWhiteSpace(a))
          {
            var str1 = "$" + Regex.Replace(a, @":\s((\S|\s)*)", String.Empty) + "$";
            var str2 = Regex.Replace(a, @"((\S|\s)*):\s*", String.Empty);
            strBuilder.Replace(str1, str2);
          }
          if (!string.IsNullOrWhiteSpace(a) && !streamReader.EndOfStream) continue;
          Console.WriteLine(strBuilder);
          strBuilder = new StringBuilder(str);
        }
      }
      return 0;
    }
  }
}