Which version of Visual Studio are you using? Unfortunately, for managed .NET projects in Visual Studio .NET 2002/2003, a command-line build always does a rebuild, so the version will always get incremented and the project (re)built again. See here for details:
http://www.kinook.com/Forum/showthread.php?threadid=303
C++ projects generally do build incrementally, but there are some VS bugs that can cause problems there as well. VS 2005 does a better job with true incremental builds for
.NET projects. If you're not building .NET projects in VS.NET 2002/2003, please ZIP and send or post more details, including:
1) The info from Help | About | Install Info
2) The .bld file
3) A build log file
4) The .sln file and project files (no source code files)
Thanks.