一、在使用Linq時，想要比較字符串類型的日期時，參考以下：
SQL語句：
1）select * from TableName where StartTime > '2015-04-08' 2）select * from TableName where StartTime >= '2015-04-08' 3）select * from TableName where StartTime < '2015-04-08' 4）select * from TableName where StartTime <= '2015-04-08'
lambda表達式寫法：
1）.Where(a => a.StartTime.CompareTo('2015-04-08') > 0) 2）.Where(a => a.StartTime.CompareTo('2015-04-08') >= 0) 3）.Where(a => a.StartTime.CompareTo('2015-04-08') < 0) 4）.Where(a => a.StartTime.CompareTo('2015-04-08') <= 0)
更規范的寫法：
1）.Where(a => String.Compare(a.StartTime, '2015-04-08', StringComparison.Ordinal) > 0) 2）.Where(a => String.Compare(a.StartTime, '2015-04-08', StringComparison.Ordinal) >= 0) 3）.Where(a => String.Compare(a.StartTime, '2015-04-08', StringComparison.Ordinal) < 0) 4）.Where(a => String.Compare(a.StartTime, '2015-04-08', StringComparison.Ordinal) <= 0)
二、但是，又遇到Linq延時查詢的問題。
