I\'ve got a simple console project where I\'m reading two Excel-files. The Excel-files are included in the project (\"add existing item\") and I\'ve marked them with \"Copy
Did you mark them as content?
I just had this problem and for some reason choosing "Create application without a manifest" under the project's properties finally copied the linked content file to the build directory.
In the file properties in Visual Studio, set:
Build action: None
Copy to output directory: Copy always