public void RemoveEntry(TimesheetEntryViewModel entry)
 {
     if (MondayEntries.Contains(entry))
     {
         MondayEntries.Remove(entry);
     }
     else if (TuesdayEntries.Contains(entry))
     {
         TuesdayEntries.Remove(entry);
     }
     else if (WednesdayEntries.Contains(entry))
     {
         WednesdayEntries.Remove(entry);
     }
     else if (ThursdayEntries.Contains(entry))
     {
         ThursdayEntries.Remove(entry);
     }
     else if (FridayEntries.Contains(entry))
     {
         FridayEntries.Remove(entry);
     }
     else if (SaturdayEntries.Contains(entry))
     {
         SaturdayEntries.Remove(entry);
     }
     else if (SundayEntries.Contains(entry))
     {
         SundayEntries.Remove(entry);
     }
 }