What is the data type of that column in your datatable? From the value you show in your csv file and the value you have when you do ToString of the datatable item, it does look like the column is of DateTime type. Try this and see if you get the same value as in the csv file
Code:
MessageBox.Show(CDate(dt.Rows(0).Item(0)).ToString("yyyy-MM-dd HH:mm"))
And we'll go from there...