Automatic Build Versioning in Visual Studio

using System;
using System.Diagnostics;
using System.IO;

namespace BeauSkinner.VerCopy
{
	/// <summary>
	/// Summary description for Class1.
	/// </summary>
	class VerCopy
	{
		/// <summary>
		/// The main entry point for the application.
		/// </summary>
		[STAThread]
		static int Main(string[] args)
		{
      if (args.Length == 0 || args.Length > 2)
      {
        Console.WriteLine("Usage: VerCopy <filename> [destination-dir].\n");
        return 1;
      }
      string PathFile = args[0];

      FileInfo fileInfo = new FileInfo(PathFile);
      if (!fileInfo.Exists)
      {
        Console.WriteLine("File does not exist.");
        return 1;
      }

      string destPath = null;
      if (args.Length == 2)
      {
        destPath = args[1].Trim("\\".ToCharArray());
        if (!Directory.Exists(destPath))
          Directory.CreateDirectory(destPath);
      }

      FileVersionInfo verInfo = FileVersionInfo.GetVersionInfo(PathFile);
      string destFile = fileInfo.Name.Substring(0,fileInfo.Name.Length-fileInfo.Extension.Length) + "-"
        + verInfo.FileMajorPart + "-" + verInfo.FileMinorPart + "-" + verInfo.FileBuildPart + fileInfo.Extension;
      if (destPath != null)
        destFile = destPath + "\\" + destFile;
      File.Copy(PathFile, destFile, true);

      return 0;
		}
	}
}