MS CRM get break duration time from business calendar

innerCalendar entitycollection  will have 2 entities
1 is business hours 
2nd one is break 

//with entity[1].attributes["duration"] will get break duration.


//temp code
                Entity BCalendar = GetCalendar(calendarGuid);

                EntityCollection calendarRules = BCalendar.GetAttributeValue<EntityCollection>(CalendarColumnNames.CalendarRules);
                var firstRulePattern = calendarRules[0].GetAttributeValue<string>(CalendarColumnNames.Pattern);

                Guid innerCalendarId = calendarRules[0].GetAttributeValue<EntityReference>(CalendarColumnNames.InnerCalendarId).Id;
                Entity innerCalendar = service.Retrieve(CalendarColumnNames.EntityName, innerCalendarId, new ColumnSet(true));
                EntityCollection innnerCalendarRule = innerCalendar.GetAttributeValue<EntityCollection>(CalendarColumnNames.CalendarRules);
                var duration = 0;
                var offset = 0;
                var BreakDuration = 0;
                BreakDuration = innerCalendar.GetAttributeValue<EntityCollection>(CalendarColumnNames.CalendarRules).Entities[1].GetAttributeValue<int>(CalendarColumnNames.Duration);
                duration = innerCalendar.GetAttributeValue<EntityCollection>(CalendarColumnNames.CalendarRules).Entities[0].GetAttributeValue<int>(CalendarColumnNames.Duration);
                offset = innerCalendar.GetAttributeValue<EntityCollection>(CalendarColumnNames.CalendarRules).Entities[0].GetAttributeValue<int>(CalendarColumnNames.Offset);
                // temp code