folder called “Dependencies” Copy in the following 7 files: NServiceBus-NServiceBus-280b6d9\build\output\NServiceBus.dll NServiceBus-NServiceBus-280b6d9\build\output\NServiceBus.pdb NServiceBus-NServiceBus-280b6d9\build\output\NServiceBus.Core.dll NServiceBus-NServiceBus-280b6d9\build\output\NServiceBus.Core.pdb NServiceBus-NServiceBus-280b6d9\build\output\host\NServiceBus.Host.exe NServiceBus-NServiceBus-280b6d9\build\output\host\NServiceBus.Host.pdb NServiceBus-NServiceBus-280b6d9\build\tools\log4net.dll from wikipedia: “PDB stands for Program Database , a proprietary file format (developed by Microsoft ) for storing debugging information about a program (or, commonly, program modules such as a DLL or EXE ). PDB