Date format fixed in datagridveiw or dataset

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C#

Hi developer
My csv file contain the date format as 23.4.2010 as dd.mm.yyy but I want that a date format can be like this 23/4/2010 as mm/dd/yyyy

Datagidview1= System.Globalization.DateTimeFormatInfo.CurrentInfo.DateSeparator

or

Datagridview1.Columns[7].DefaultCellStyle.Format = System.Globalization.DateTimeFormatInfo.CurrentInfo.ShortDatePattern;

this code is not work

I want to take a format that apply on all the columns that contain a date. and when csv file load , date format automatically applied . not on index number. because I have no more Confident that all the values always at their particular cell position.


so please so my problem by solve this code problem