Configuration File transformer, easy to integrate config transformation with build systems

ConfigurationTransformer.cs

// You need to install 'Microsoft.Web.Xdt' from nuget ==> Install-Package Microsoft.Web.Xdt
using System;
using System.Reflection;
using Microsoft.Web.XmlTransform;

namespace ConfigTransformer
{
    internal class Program
    {
        private enum ExitCode : int
        {
            Success = 0,
            InvalidParameters = 1
        }

        private static int Main(string[] args)
        {
            var version = Assembly.GetEntryAssembly().GetName().Version;

            Console.WriteLine(
                 "==================\n"
               + string.Format(" Config Transformer v{0}.{1}\n", version.Major, version.Minor)
               + "==================\n");

            if (args == null || args.Length != 3)
            {
                Console.WriteLine(
                      "Error: Unexpected number of paramters.\n"
                    + "Usage: ConfigTransformer source-file transform-file output-file\n"
                    + "  source-file : (Input) The original config file\n"
                    + "  transform-file : (Input) The transform config file\n"
                    + "  output-file : (Output) The output config file\n");

                return (int)ExitCode.InvalidParameters;
            }

            Console.WriteLine("- Applying transform to source . . .\n");
            var source = new XmlTransformableDocument();
            source.Load(args[0]);

            var transform = new XmlTransformation(args[1]);
            transform.Apply(source);

            source.Save(args[2]);

            return (int)ExitCode.Success;
        }
    }
}