String was not recognized as a valid DateTime

Question

Hi

  I have below code . I am getting above error on - DateTime StartDate = Convert.ToDateTime(colum[1].ToString());

I have below data in xls file. I am trying to Upload. I am using SQl. Datatype is date

MentorID	Date	StartTime
1422	04-19-2023	2023-04-19 11:00:00
1422	04/21/2023	2023-04-21 11:00:00

Thanks