I received this dreaded error, related to ClosedXML, when I deployed my project to the server.
The project runs locally, though.
Could not load file or assembly 'DocumentFormat.OpenXml, Version=2.5.5631.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' or one of its dependencies. The system cannot find the file specified.
So I placed the "missing" DLL file in /binDLL
I then added the following cmd line directive:
Copy "$(SolutionDir)binDLL\DocumentFormat.OpenXml.dll" "$(ProjectDir)$(OutDir)"
When I build, I get a build error
Error 17 The command "Copy "C:\Projects\MyProject\binDLL\DocumentFormat.OpenXml.dll" "C:\Projects\MyProject\bin\"" exited with code 1