Automatic Build Versioning in Visual Studio

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

namespace BeauSkinner.VerHeader
{
	/// <summary>
	/// Summary description for Class1.
	/// </summary>
	class VerHeader
	{
		/// <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: VerHeader <resource-file> [output-file=version.h]");
        return 1;
      }
      string RCFileStr = args[0];

      string outFileStr = "version.h";
      if (args.Length == 2)
        outFileStr = args[1];

      StreamReader RCFile = null;
      try
      {
        RCFile = new StreamReader(RCFileStr);
      }
      catch
      {
        Console.WriteLine("Error opening resource file {0}.", RCFileStr);
        return 1;
      }

      string major = null, minor = null, build = null;
      string line;
      while ((line = RCFile.ReadLine()) != null)
      {
        int pos;
        if ((pos = line.IndexOf("FILEVERSION")) < 0)
          continue;
        pos += "FILEVERSION".Length + 1;
        string[] tempInfo = line.Substring(pos).Split(" .,".ToCharArray());
        ArrayList verInfo = new ArrayList(4);
        foreach (string s in tempInfo)
          if (s.Length > 0)
            verInfo.Add(s);
        if (verInfo.Count != 4)
          break;
        major = verInfo[0].ToString();
        minor = verInfo[1].ToString();
        build = verInfo[2].ToString();
      }

      if (major == null)
      {
        Console.WriteLine("Version information not found in resource file {0}.", RCFileStr);
        return 1;
      }

      StreamWriter outFile = null;
      try
      {
        outFile = new StreamWriter(outFileStr, false);
        outFile.AutoFlush = true;
      }
      catch
      {
        Console.WriteLine("Error opening output file {0} for overwriting.", outFileStr);
        return 1;
      }

      outFile.WriteLine("#define MAJORVERSION {0}", major);
      outFile.WriteLine("#define MINORVERSION {0}", minor);
      outFile.WriteLine("#define BUILDNUMBER {0}", build);

      RCFile.Close();
      outFile.Close();

      return 0;
		}
	}
}