The C# developer has a number of options. Roughly in terms of increasing effort.
1. Do what I did. You don't actually reference the PB Assembly in the C# code, but it is a quick and dirty way to make sure that it gets copied to the output directory.
2. Do a "Add->Existing Item" in the Solution Explorer and mark the file for "Copy to Output Folder". That makes the PB Assembly show up in the solution files rather than as a reference.
3. Add a post build event that copies the file to the output folder.
The third solution is also perhaps the most appropriate, but they all should work.