Concatenate files without extra Tool

Every once in a while I face extremely simple tasks for which I don’t see the simple solution. Not long ago I had to concatenate two binary files into a single one. I really didn’t know how to do it without any major efforts on Windows. I thought of many terrible ideas: copying everything onto a Linux machine, using a Powershell script, googleing for a tool, throwing up a small DotNet tool myself. Luckily I decided to google for the problem and not for a tool. As result I learned that Windows can do the job itself. Well, the old DOS commands can, which are still available on Windows:

copy /y /b file1+file2 dest

Embarrassingly simple.