The C1CalendarResources keeps the set of resources used by the C1MultiMonthCalendar derived controls. Static fields of this class return default C1MultiMonthCalendar's themes.
If Theme property is set to something other than Classic System Colors theme, the lookup process checks for the requested key within the resource dictionary defined by the current control theme
The lookup process checks resources in a usual way (in page, window or application resources)
The lookup process checks resources in default theme dictionary.