C#字元串轉化為時間

**第一種方法**
			 string timeStr = "2019-08-28";
			DateTime yesTime = Convert.ToDateTime(timeStr);

 **第二種：**
            DateTimeFormatInfo timeForInfo = new DateTimeFormatInfo();
            timeForInfo.ShortDatePattern = "yyyy/MM/dd";
            string timeStr1 = "2018-09-08";
            var time = Convert.ToDateTime(timeStr1, timeForInfo);
            
**第三種:**
            string dateString = "20190526";
            DateTime dt = DateTime.ParseExact(dateString, "yyyyMMdd", System.Globalization.CultureInfo.CurrentCulture);