var deletedItems = tmpData.FindAll(qr => (Int32)qr.YearQuarter < (Int32)useDate.YearQuarter);'
userdate.yearquarter
は
<Extension()>
Public Function YearQuarter(currentDate As Date) As Integer
Return Library.Dates.ToYearQuarter(currentDate)
End Function
ここでエラーが発生します:
"< (Int32)useDate.YearQuarter;"