How do I control where FontConfig is located?
You can call PDFNet.SetPersistentCachePath() Before you call PDFNet.Initialize().
You the environment variables that are impportant in this case are `FONTCONFIG_PATH` and/or `FONTCONFIG_FILE`. Fontconfig will use these to find the xml configuration file.
If only the path is defined, FontConfig will look for $FONTCONFIG_PATH/fonts.conf
Or, if both are defined and FONTCONFIG_FILE is relative, then $FONTCONFIG_PATH/$FONTCONFIG_FILE will be used.
Alternatively, FONTCONFIG_FILE can be an absolute path (in which case FONTCONFIG_PATH is ignored)
In case you do not already have one, attached is a barebones config file that can be edited and placed in the configured location.