slide/mono — comment on commit 407dd029e3f1ec712a7f6a8b684b8ee8d2a18b61
File: mcs/class/Microsoft.Build.Tasks/Microsoft.Build.Tasks/Copy.cs line 213
By slide:

The only problem with that is that the Hidden attribute doesn't do anything on Linux (which is where I am developing). Trying to set the Hidden attribute does nothing.