Portal projects will be downloaded and cached in the
location specified. Setting the download location to null or empty
string will default it back to the original default (typically
the Documents\ArcGIS\OnlineProjects in your user profile)
// access the current options
var def_home = ApplicationOptions.GeneralOptions.PortalProjectCustomHomeFolder;
var def_gdb = ApplicationOptions.GeneralOptions.PortalProjectCustomDefaultGeodatabase;
var def_tbx = ApplicationOptions.GeneralOptions.PortalProjectCustomDefaultToolbox;
var deleteOnClose = ApplicationOptions.GeneralOptions.PortalProjectDeleteLocalCopyOnClose;
var def_location = ApplicationOptions.GeneralOptions.PortalProjectDownloadLocation;
// set the options
ApplicationOptions.GeneralOptions.PortalProjectCustomHomeFolder = @"E:\data";
ApplicationOptions.GeneralOptions.PortalProjectCustomDefaultGeodatabase = @"E:\data\usa.gdb";
ApplicationOptions.GeneralOptions.PortalProjectCustomDefaultToolbox = @"E:\data\usa.tbx";
ApplicationOptions.GeneralOptions.PortalProjectDeleteLocalCopyOnClose = false;
ApplicationOptions.GeneralOptions.PortalProjectDownloadLocation = @"E:\data";